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TM14: Advanced Railroad Grade Crossing

This service package manages highway traffic at highway-rail intersections (HRIs) where operational requirements demand advanced features (e.g., where rail operational speeds are greater than 80 miles per hour). This service package includes all capabilities from the Standard Railroad Grade Crossing service package and augments these with additional safety features to mitigate the risks associated with higher rail speeds and leverage Connected Vehicle technologies. The active warning systems supported by this service package include positive barrier systems that preclude entrance into the intersection when the barriers are activated. Like the Standard package, the HRI equipment is activated on notification by wayside interface equipment which detects, or communicates with the approaching train. In this service package, the wayside equipment provides additional information about the arriving train so that the train's direction of travel, estimated time of arrival, and estimated duration of closure may be derived. This service package will alert and/or warn drivers who are approaching an at-grade railroad crossing if they are on a crash-imminent trajectory to collide with a crossing or approaching train. This enhanced information may be conveyed to the driver prior to, or in context with, warning system activation. This service package also includes additional detection capabilities that enable it to detect an entrapped or otherwise immobilized vehicle within the HRI and provide an immediate notification to highway and railroad officials.

Relevant Regions: Australia, Canada, European Union, and United States

Enterprise

Development Stage Roles and Relationships

Installation Stage Roles and Relationships

Operations and Maintenance Stage Roles and Relationships
(hide)

Source Destination Role/Relationship
Connected Vehicle Roadside Equipment Maintainer Connected Vehicle Roadside Equipment Maintains
Connected Vehicle Roadside Equipment Manager Connected Vehicle Roadside Equipment Manages
Connected Vehicle Roadside Equipment Owner Connected Vehicle Roadside Equipment Maintainer System Maintenance Agreement
Connected Vehicle Roadside Equipment Owner Connected Vehicle Roadside Equipment Manager Operations Agreement
Connected Vehicle Roadside Equipment Owner ITS Roadway Equipment Maintainer Maintenance Data Exchange Agreement
Connected Vehicle Roadside Equipment Owner ITS Roadway Equipment Owner Information Exchange and Action Agreement
Connected Vehicle Roadside Equipment Owner ITS Roadway Equipment User Service Usage Agreement
Connected Vehicle Roadside Equipment Owner Pedestrian Application Usage Agreement
Connected Vehicle Roadside Equipment Owner Personal Information Device Maintainer Maintenance Data Exchange Agreement
Connected Vehicle Roadside Equipment Owner Personal Information Device Owner Information Exchange and Action Agreement
Connected Vehicle Roadside Equipment Owner Personal Information Device User Service Usage Agreement
Connected Vehicle Roadside Equipment Owner Traffic Management Center Maintainer Maintenance Data Exchange Agreement
Connected Vehicle Roadside Equipment Owner Traffic Management Center Owner Information Exchange and Action Agreement
Connected Vehicle Roadside Equipment Owner Traffic Management Center User Service Usage Agreement
Connected Vehicle Roadside Equipment Owner Vehicle Maintainer Maintenance Data Exchange Agreement
Connected Vehicle Roadside Equipment Owner Vehicle Owner Information Exchange and Action Agreement
Connected Vehicle Roadside Equipment Owner Vehicle User Service Usage Agreement
Connected Vehicle Roadside Equipment Owner Wayside Equipment Maintainer Maintenance Data Exchange Agreement
Connected Vehicle Roadside Equipment Owner Wayside Equipment Owner Information Exchange and Action Agreement
Connected Vehicle Roadside Equipment Owner Wayside Equipment User Service Usage Agreement
Connected Vehicle Roadside Equipment Supplier Connected Vehicle Roadside Equipment Owner Warranty
ITS Roadway Equipment Maintainer ITS Roadway Equipment Maintains
ITS Roadway Equipment Manager ITS Roadway Equipment Manages
ITS Roadway Equipment Owner Connected Vehicle Roadside Equipment Maintainer Maintenance Data Exchange Agreement
ITS Roadway Equipment Owner Connected Vehicle Roadside Equipment Owner Information Exchange and Action Agreement
ITS Roadway Equipment Owner Connected Vehicle Roadside Equipment User Service Usage Agreement
ITS Roadway Equipment Owner ITS Roadway Equipment Maintainer System Maintenance Agreement
ITS Roadway Equipment Owner ITS Roadway Equipment Manager Operations Agreement
ITS Roadway Equipment Owner Other ITS Roadway Equipment Maintainer Maintenance Data Exchange Agreement
ITS Roadway Equipment Owner Other ITS Roadway Equipment Owner Information Exchange and Action Agreement
ITS Roadway Equipment Owner Other ITS Roadway Equipment User Service Usage Agreement
ITS Roadway Equipment Owner Traffic Management Center Maintainer Maintenance Data Exchange Agreement
ITS Roadway Equipment Owner Traffic Management Center Owner Information Exchange and Action Agreement
ITS Roadway Equipment Owner Traffic Management Center User Service Usage Agreement
ITS Roadway Equipment Owner Wayside Equipment Maintainer Maintenance Data Exchange Agreement
ITS Roadway Equipment Owner Wayside Equipment Owner Information Exchange and Action Agreement
ITS Roadway Equipment Owner Wayside Equipment User Service Usage Agreement
ITS Roadway Equipment Supplier ITS Roadway Equipment Owner Warranty
Other ITS Roadway Equipment Maintainer Other ITS Roadway Equipment Maintains
Other ITS Roadway Equipment Manager Other ITS Roadway Equipment Manages
Other ITS Roadway Equipment Owner ITS Roadway Equipment Maintainer Maintenance Data Exchange Agreement
Other ITS Roadway Equipment Owner ITS Roadway Equipment Owner Information Exchange and Action Agreement
Other ITS Roadway Equipment Owner ITS Roadway Equipment User Service Usage Agreement
Other ITS Roadway Equipment Owner Other ITS Roadway Equipment Maintainer System Maintenance Agreement
Other ITS Roadway Equipment Owner Other ITS Roadway Equipment Manager Operations Agreement
Other ITS Roadway Equipment Supplier Other ITS Roadway Equipment Owner Warranty
Pedestrian Personal Information Device Operates
Personal Information Device Maintainer Personal Information Device Maintains
Personal Information Device Manager Pedestrian System Usage Agreement
Personal Information Device Manager Personal Information Device Manages
Personal Information Device Owner Connected Vehicle Roadside Equipment Maintainer Maintenance Data Exchange Agreement
Personal Information Device Owner Connected Vehicle Roadside Equipment Owner Information Provision and Action Agreement
Personal Information Device Owner Connected Vehicle Roadside Equipment User Service Usage Agreement
Personal Information Device Owner Personal Information Device Maintainer System Maintenance Agreement
Personal Information Device Owner Personal Information Device Manager Operations Agreement
Personal Information Device Supplier Personal Information Device Owner Warranty
Rail Operations Center Maintainer Rail Operations Center Maintains
Rail Operations Center Manager Rail Operations Center Manages
Rail Operations Center Owner Rail Operations Center Maintainer System Maintenance Agreement
Rail Operations Center Owner Rail Operations Center Manager Operations Agreement
Rail Operations Center Supplier Rail Operations Center Owner Warranty
Traffic Management Center Maintainer Traffic Management Center Maintains
Traffic Management Center Manager Traffic Management Center Manages
Traffic Management Center Owner Connected Vehicle Roadside Equipment Maintainer Maintenance Data Exchange Agreement
Traffic Management Center Owner Connected Vehicle Roadside Equipment Owner Information Provision Agreement
Traffic Management Center Owner Connected Vehicle Roadside Equipment User Service Usage Agreement
Traffic Management Center Owner ITS Roadway Equipment Maintainer Maintenance Data Exchange Agreement
Traffic Management Center Owner ITS Roadway Equipment Owner Information Provision Agreement
Traffic Management Center Owner ITS Roadway Equipment User Service Usage Agreement
Traffic Management Center Owner Rail Operations Center Maintainer Maintenance Data Exchange Agreement
Traffic Management Center Owner Rail Operations Center Owner Information Provision Agreement
Traffic Management Center Owner Rail Operations Center User Service Usage Agreement
Traffic Management Center Owner Traffic Management Center Maintainer System Maintenance Agreement
Traffic Management Center Owner Traffic Management Center Manager Operations Agreement
Traffic Management Center Supplier Traffic Management Center Owner Warranty
Vehicle Maintainer Vehicle Maintains
Vehicle Manager Vehicle Manages
Vehicle Owner Connected Vehicle Roadside Equipment Maintainer Maintenance Data Exchange Agreement
Vehicle Owner Connected Vehicle Roadside Equipment Owner Expectation of Data Provision
Vehicle Owner Connected Vehicle Roadside Equipment User Service Usage Agreement
Vehicle Owner Vehicle Maintainer System Maintenance Agreement
Vehicle Owner Vehicle Manager Operations Agreement
Vehicle Supplier Vehicle Owner Warranty
Wayside Equipment Maintainer Wayside Equipment Maintains
Wayside Equipment Manager Wayside Equipment Manages
Wayside Equipment Owner Connected Vehicle Roadside Equipment Maintainer Maintenance Data Exchange Agreement
Wayside Equipment Owner Connected Vehicle Roadside Equipment Owner Information Exchange and Action Agreement
Wayside Equipment Owner Connected Vehicle Roadside Equipment User Service Usage Agreement
Wayside Equipment Owner ITS Roadway Equipment Maintainer Maintenance Data Exchange Agreement
Wayside Equipment Owner ITS Roadway Equipment Owner Information Exchange and Action Agreement
Wayside Equipment Owner ITS Roadway Equipment User Service Usage Agreement
Wayside Equipment Owner Wayside Equipment Maintainer System Maintenance Agreement
Wayside Equipment Owner Wayside Equipment Manager Operations Agreement
Wayside Equipment Supplier Wayside Equipment Owner Warranty

Functional

This service package includes the following Functional View PSpecs:

Physical Object Functional Object PSpec Number PSpec Name
Connected Vehicle Roadside Equipment RSE Rail Crossing Warning 1.1.1.6 Collect Vehicle Roadside Safety Data
1.1.2.6 Process Collected Vehicle Safety Data
1.2.7.15 Process Intersection Safety Data
1.2.7.4 Process In-vehicle Signage Data
1.2.7.7 Process Vehicle Safety and Environmental Data for Output
ITS Roadway Equipment Roadway Advanced Rail Crossing 1.2.7.1 Process Indicator Output Data for Roads
1.6.1.1 Detect Roadway Events
1.6.1.2.4 Provide HSR Device Controls
1.6.1.4.1 Generate Alerts and Advisories
1.6.1.4.3 Report Alerts and Advisories
1.6.1.4.4 Report HRI Status on Approach
1.6.1.5 Detect HRI Hazards
1.6.1.6.1 Close HRI on Detection
1.6.1.6.2 Detect Imminent Vehicle/Train Collision
1.6.1.7.1 Control Traffic Volume at Active HRI
1.6.1.7.2 Close HRI on Command
1.6.3.1 Interact with Wayside Systems
1.6.3.2 Advise and Protect Train Crews
1.6.3.3 Provide ATS Alerts
1.6.5.1 Provide Interactive Interface
Roadway Basic Surveillance 1.1.1.1 Process Traffic Sensor Data
1.1.1.7 Process Road User Protection
1.1.2.11 Control Dynamic Lanes
1.2.7.16 Process Signal Control Conflict Monitoring
1.2.7.2 Monitor Roadside Equipment Operation
1.2.7.8 Provide Device Interface to Other Roadway Devices
1.3.1.3 Process Traffic Images
9.2.3.6 Collect Field Equipment Status for Repair
9.3.3.1 Collect Vehicle Speed
Roadway Signal Control 1.1.1.1 Process Traffic Sensor Data
1.2.7.1 Process Indicator Output Data for Roads
1.2.7.13 Provide Device Interface for Field Management Stations
1.2.7.16 Process Signal Control Conflict Monitoring
1.2.7.2 Monitor Roadside Equipment Operation
1.2.7.8 Provide Device Interface to Other Roadway Devices
Roadway Signal Preemption 1.2.7.1 Process Indicator Output Data for Roads
1.2.7.2 Monitor Roadside Equipment Operation
1.2.7.3 Manage Local Signal Priority and Preemption Requests
Personal Information Device Personal Pedestrian Safety 6.8.1.3 Process Personal Portable Device Location Data
6.8.2.3 Monitor Pedestrian Safety Status
6.8.2.4 Provide Pedestrian Personal Interface
6.8.3.3 Provide Traveler Personal Interface
6.8.3.6 Provide Personal Safety Messages
Traffic Management Center TMC Advanced Rail Crossing Management 1.2.4.4 Output Roadway Information Data
1.2.8 Collect Traffic Field Equipment Fault Data
1.6.2.1 Exchange Data with Rail Operations
1.6.2.2 Manage Alerts and Advisories
1.6.2.3 Manage Rail Traffic Control Data
1.6.4.1 Manage HRI Closures
1.6.4.2 Exchange Data with Traffic Management
TMC Basic Surveillance 1.1.2.1 Process Traffic Data for Storage
1.1.2.2 Process Traffic Data
1.1.2.3 Update Data Source Static Data
1.1.2.5 Process Vehicle Situation Data
1.1.2.8 Process Roadway Environmental Data
1.1.3 Generate Predictive Traffic Model
1.1.4.1 Retrieve Traffic Data
1.1.4.2 Provide Traffic Operations Personnel Traffic Data Interface
1.1.5 Exchange Data with Other Traffic Centers
1.2.6.1 Maintain Traffic and Sensor Static Data
1.2.8 Collect Traffic Field Equipment Fault Data
1.3.1.1 Analyze Traffic Data for Incidents
1.3.2.1 Store Possible Incident Data
1.3.2.5 Provide Current Incidents Store Interface
1.3.2.6 Manage Traffic Routing
1.3.4.2 Provide Traffic Operations Personnel Incident Interface
1.3.4.5 Process Video Data
TMC Signal Control 1.1.2.2 Process Traffic Data
1.1.2.5 Process Vehicle Situation Data
1.1.4.1 Retrieve Traffic Data
1.1.4.4 Manage Traffic Archive Data
1.1.5 Exchange Data with Other Traffic Centers
1.2.1 Select Strategy
1.2.2.2 Determine Indicator State for Road Management
1.2.4.1 Output Control Data for Roads
1.2.6.1 Maintain Traffic and Sensor Static Data
1.2.8 Collect Traffic Field Equipment Fault Data
Vehicle Vehicle Rail Crossing Warning 3.1.1 Produce Collision and Crash Avoidance Data
3.1.3 Process Vehicle On-board Data
6.7.1.3 Process Vehicle Location Data
6.7.1.4 Update Vehicle Navigable Map Database
6.7.3.2 Provide Driver Information Interface

Physical

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Includes Physical Objects:

Physical Object Class Description
Connected Vehicle Roadside Equipment Field 'Connected Vehicle Roadside Equipment' (CV RSE) represents the Connected Vehicle roadside devices (i.e., Roadside Units (RSUs)) equipped with short range wireless (SRW) communications technology, as well as any other supporting equipment that leverage the RSU and are not described by other objects (e.g., a local roadside processor). CVRSE are used to send messages to, and receive messages from, nearby vehicles and personal devices equipped with compatible communications technology. Communications with adjacent field equipment and back office centers that monitor and control the RSE are also supported. This device operates from a fixed position and may be permanently deployed or a portable device that is located temporarily in the vicinity of a traffic incident, road construction, or a special event. It includes a processor, data storage, and communications capabilities that support secure communications with passing vehicles, other field equipment, and centers.
Driver Vehicle The 'Driver' represents the person that operates a vehicle on the roadway. Included are operators of private, transit, commercial, and emergency vehicles where the interactions are not particular to the type of vehicle (e.g., interactions supporting vehicle safety applications). The Driver originates driver requests and receives driver information that reflects the interactions which might be useful to all drivers, regardless of vehicle classification. Information and interactions which are unique to drivers of a specific vehicle type (e.g., fleet interactions with transit, commercial, or emergency vehicle drivers) are covered by separate objects.
ITS Roadway Equipment Field 'ITS Roadway Equipment' represents the ITS equipment that is distributed on and along the roadway that monitors and controls traffic and monitors and manages the roadway. This physical object includes traffic detectors, environmental sensors, traffic signals, highway advisory radios, dynamic message signs, CCTV cameras and video image processing systems, grade crossing warning systems, and ramp metering systems. Lane management systems and barrier systems that control access to transportation infrastructure such as roadways, bridges and tunnels are also included. This object also provides environmental monitoring including sensors that measure road conditions, surface weather, and vehicle emissions. Work zone systems including work zone surveillance, traffic control, driver warning, and work crew safety systems are also included.
MMV User Personal The 'MMV User' represents the person that operates a micromobility vehicle (MMV). Included are cyclists and operators of other low-powered mobility devices such as e-scooters, powered wheelchairs, and power assisted bicycles where the interactions are not particular to the type of vehicle (e.g., interactions supporting vehicle safety applications). The MMV User participates in ITS services that support safe, shared use of the transportation network by motorized and non-motorized transportation modes. Representing those using non-motorized travel modes, and in particular bicyclists that sometimes share motor vehicle lanes, these MMV users provide input (e.g. a call signal requesting right of way at an intersection) and may be detected by ITS services to improve safety. The MMV User originates requests and receives information that reflects the interactions which might be useful to all users, regardless of vehicle type.
Other ITS Roadway Equipment Field Representing another set of ITS Roadway Equipment, 'Other ITS Roadway Equipment' supports 'field device' to 'field device' communication and coordination, and provides a source and destination for information that may be exchanged between ITS Roadway Equipment. The interface enables direct coordination between field equipment. Examples include the direct interface between sensors and other roadway devices (e.g., Dynamic Message Signs) and the direct interface between roadway devices (e.g., between a Signal System Master and Signal System Local equipment) or a connection between an arterial signal system master and a ramp meter controller.
Pedestrian Personal The 'Pedestrian' represents a person traveling on foot. Pedestrians participate in ITS services that support safe, shared use of the transportation network. Included are visually impaired travelers who travel through portions of the transportation network and interact with ITS systems. They provide input (e.g. a call signal requesting right of way at an intersection) and may be detected by ITS services to improve safety
Personal Information Device Personal The 'Personal Information Device' provides the capability for travelers to receive formatted traveler information wherever they are. Capabilities include traveler information, trip planning, and route guidance. Frequently a smart phone, the Personal Information Device provides travelers with the capability to receive route planning and other personally focused transportation services from the infrastructure in the field, at home, at work, or while en-route. Personal Information Devices may operate independently or may be linked with vehicle on-board equipment. This subsystem also supports safety related services with the capability to broadcast safety messages and initiate a distress signal or request for help.
Rail Operations Center Center 'Rail Operations Center' represents the (usually) centralized control point for a substantial segment of a freight railroad's operations and maintenance activities. It is roughly the railroad equivalent to a highway Traffic Management Center. It is the source and destination of information that can be used to coordinate rail and highway traffic management and maintenance operations. It is also the source and destination for incident, incident response, disaster, or evacuation information that is exchanged with an Emergency Management Center. The use of a single object for multiple sources and destination for information exchange with railroads implies the need for a single, consistent interface between a given railroad's operations and maintenance activities and ITS.
Traffic Management Center Center The 'Traffic Management Center' monitors and controls traffic and the road network. It represents centers that manage a broad range of transportation facilities including freeway systems, rural and suburban highway systems, and urban and suburban traffic control systems. It communicates with ITS Roadway Equipment and Connected Vehicle Roadside Equipment (RSE) to monitor and manage traffic flow and monitor the condition of the roadway, surrounding environmental conditions, and field equipment status. It manages traffic and transportation resources to support allied agencies in responding to, and recovering from, incidents ranging from minor traffic incidents through major disasters.
Vehicle Vehicle This 'Vehicle' physical object is used to model core capabilities that are common to more than one type of Vehicle. It provides the vehicle-based general sensory, processing, storage, and communications functions that support efficient, safe, and convenient travel. Many of these capabilities (e.g., see the Vehicle Safety service packages) apply to all vehicle types including personal vehicles, commercial vehicles, emergency vehicles, transit vehicles, and maintenance vehicles. From this perspective, the Vehicle includes the common interfaces and functions that apply to all motorized vehicles. The radio(s) supporting V2V and V2I communications are a key component of the Vehicle. Both one-way and two-way communications options support a spectrum of information services from basic broadcast to advanced personalized information services. Advanced sensors, processors, enhanced driver interfaces, and actuators complement the driver information services so that, in addition to making informed mode and route selections, the driver travels these routes in a safer and more consistent manner. This physical object supports all six levels of driving automation as defined in SAE J3016. Initial collision avoidance functions provide 'vigilant co-pilot' driver warning capabilities. More advanced functions assume limited control of the vehicle to maintain lane position and safe headways. In the most advanced implementations, this Physical Object supports full automation of all aspects of the driving task, aided by communications with other vehicles in the vicinity and in coordination with supporting infrastructure subsystems.
Wayside Equipment Field 'Wayside Equipment' represents train interface equipment (usually) maintained and operated by the railroad and (usually) physically located at or near a grade crossing. It is a source and destination for information for, or about, approaching trains and their crews (e.g. the time at which the train will arrive and the time it will take to clear a crossing, crossing status or warnings, etc.). Generally one wayside equipment interface would be associated with one highway rail intersection. However, multiple crossings may be controlled using information based on data from one wayside equipment interface.

Includes Functional Objects:

Functional Object Description Physical Object
Personal Pedestrian Safety 'Personal Pedestrian Safety' improves pedestrian, cyclist, and other vulnerable road user safety by providing personal location information to the infrastructure that can be used to avoid collisions involving vulnerable road users. It may also alert the vulnerable road user of unsafe conditions, augmenting or extending information provided by signals and signs. The information provided and the user interface delivery mechanism (visual, audible, or haptic) can also be tailored to the needs of the user that is carrying or wearing the device that hosts the application. Personal Information Device
Roadway Advanced Rail Crossing 'Roadway Advanced Rail Crossing' manages highway traffic at highway-rail intersections (HRIs) where operational requirements demand advanced features (e.g., where rail operational speeds are greater than 80 miles per hour). The active warning systems supported by this application include positive barrier systems which preclude entrance into the intersection when the barriers are activated. This application is activated on notification by wayside interface equipment which detects, or communicates with the approaching train. In this application, additional information about the arriving train is also provided by the wayside interface equipment so that the train's direction of travel, its estimated time of arrival, and the estimated duration of closure may be derived. This enhanced information may be conveyed to the driver prior to, or in context with, warning system activation. This application also includes detection capabilities which enable it to detect an entrapped or otherwise immobilized vehicle on the grade crossing and provide an immediate notification to the wayside interface equipment and traffic management. ITS Roadway Equipment
Roadway Basic Surveillance 'Roadway Basic Surveillance' monitors traffic conditions using fixed equipment such as loop detectors and CCTV cameras. ITS Roadway Equipment
Roadway Signal Control 'Roadway Signal Control' includes the field elements that monitor and control signalized intersections. It includes the traffic signal controllers, detectors, conflict monitors, signal heads, and other ancillary equipment that supports traffic signal control. It also includes field masters, and equipment that supports communications with a central monitoring and/or control system, as applicable. The communications link supports upload and download of signal timings and other parameters and reporting of current intersection status. It represents the field equipment used in all levels of traffic signal control from basic actuated systems that operate on fixed timing plans through adaptive systems. It also supports all signalized intersection configurations, including those that accommodate pedestrians. In advanced, future implementations, environmental data may be monitored and used to support dilemma zone processing and other aspects of signal control that are sensitive to local environmental conditions. ITS Roadway Equipment
Roadway Signal Preemption 'Roadway Signal Preemption' includes the field elements that receive signal preemption requests from trains, boats (i.e., drawbridge crossings), emergency vehicles, or light rail transit vehicles approaching a signalized intersection and overrides the current operation of the traffic signals to stop conflicting traffic and grant right-of-way to the approaching vehicle. This functional object also services preemption requests received from a TMC to support implementations where the preemption requests are managed by the center. ITS Roadway Equipment
RSE Rail Crossing Warning 'RSE Rail Crossing Warning' is a connected vehicle application that improves safety at rail crossings. It communicates with wayside equipment that detects or communicates with approaching trains. It provides rail crossing warnings and train arrival information to approaching vehicles and monitors connected vehicles that may intrude on the crossing. Connected Vehicle Roadside Equipment
TMC Advanced Rail Crossing Management 'TMC Advanced Rail Crossing Management' monitors and controls rail crossing traffic control equipment at advanced crossings that provide additional information on approaching trains, detect and report obstructions on the grade crossing, and communicate directly with equipped vehicles approaching the crossing. It remotely monitors and reports the status of the rail crossing equipment and sends control plan updates to the equipment. It also provides enhanced coordination between rail operations and traffic management centers that supports forecast of closure times and durations that may be applied to advanced traffic control strategies or delivered as enhanced traveler information. Traffic Management Center
TMC Basic Surveillance 'TMC Basic Surveillance' remotely monitors and controls traffic sensor systems and surveillance (e.g., CCTV) equipment, and collects, processes and stores the collected traffic data. Current traffic information and other real-time transportation information is also collected from other centers. The collected information is provided to traffic operations personnel and made available to other centers. Traffic Management Center
TMC Signal Control 'TMC Signal Control' provides the capability for traffic managers to monitor and manage the traffic flow at signalized intersections. This capability includes analyzing and reducing the collected data from traffic surveillance equipment and developing and implementing control plans for signalized intersections. Control plans may be developed and implemented that coordinate signals at many intersections under the domain of a single Traffic Management Center and are responsive to traffic conditions and adapt to support incidents, preemption and priority requests, pedestrian crossing calls, etc. Traffic Management Center
Vehicle Rail Crossing Warning 'Vehicle Rail Crossing Warning ' uses I2V communications to receive alerts of trains entering HRIs and to provide warnings to drivers regarding the trains. The warning can include second train warning (meaning the HRI gates are about to lower, or remain lowered due to the arrival of a second train). The application can also provide vehicle infringement warnings by using the alert information along with vehicle trajectory information to determine that the vehicle will infringe upon a crossing that is (or will be) occupied by a train. Vehicle

Includes Information Flows:

Information Flow Description
arriving train information Information for a train approaching a highway-rail intersection that may include direction and allow calculation of approximate arrival time and closure duration.
crossing call Non-motorized user request to cross the roadway. This is an overt request from a pedestrian, micromobility vehicle user (e.g., cyclist), or other vulnerable road user. This overt request may be a physical button push or hovering or gesturing in the vicinity of the button that supports contactless activation.
crossing permission Information provided to guide and warn pedestrians, micromobility vehicle users (e.g., cyclists), and other crosswalk users. It includes crossing request acknowledgment, current crossing permission, crossing time remaining, and real-time warnings of safety threats.
driver information Regulatory, warning, guidance, and other information provided to the driver to support safe and efficient vehicle operation.
driver updates Information provided to the driver including visual displays, audible information and warnings, and haptic feedback. The updates inform the driver about current conditions, potential hazards, and the current status of vehicle on-board equipment.
intersection infringement info Vehicle path information sent by a vehicle that is performing an unpermitted movement at an intersection such as a stop sign violation or running a red light. This also includes information about possible conflicts with other road users in the vehicle's path, including a range of uncontrolled intersection scenarios that could be covered by this flow. This flow does not include permanent ids; only temporary ones that allow monitoring of the vehicle as it moves across the intersection.
personal location The current location (latitude, longitude, and elevation) reported by the personal information or safety device
personal updates Personal information, alerts, and warnings provided to pedestrians, micromobility vehicle (MMV) users, work crew members, and other individuals in a mixed use area. This includes visual, audio, and haptic outputs that may be customized to support individual needs.
rail crossing advisories Notification of Highway-Rail Intersection equipment failure, intersection blockage, or other condition requiring attention, and maintenance activities at or near highway rail intersections.
rail crossing application info Rail crossing and device configuration data and warning parameters and thresholds. This flow also supports remote control of the application so the application can be taken offline, reset, or restarted.
rail crossing application status Rail crossing application status reported by the RSE. This includes current operational state and status of the RSE and a record of rail crossing events and alerts and warnings issued.
rail crossing blockage notification Notification that a highway-rail intersection is obstructed and supporting information.
rail crossing control data Data required for HRI information transmitted at railroad grade crossings and within railroad operations.
rail crossing operational status Status of the highway-rail grade crossing equipment including both the current state or mode of operation and the current equipment condition.
rail crossing request A request for highway-rail intersection status or a specific control request intended to modify HRI operation.
rail crossing status Status of the highway-rail intersection equipment including both the current state or mode of operation and the current equipment condition.
rail crossing warning A warning of a train approaching or already in a highway rail intersection.
right-of-way request coordination The direct flow of information between field equipment. This includes notification of crossing calls from pedestrians and other vulnerable road users and requests for signal prioritization or preemption, and any other request for right-of-way at an intersection. The status of the request is also shared. For vulnerable road users, this includes information provided to guide and warn vulnerable road users at crossings including crossing permission status and crossing time remaining.
right-of-way request notification Notice that a request has occurred for signal prioritization, signal preemption, pedestrian call, multi-modal crossing activation, or other source for right-of-way.
signal control commands Control of traffic signal controllers or field masters including clock synchronization.
signal control coordination The direct flow of information between field equipment. This includes configuration and control of traffic signal controllers or field masters. Configuration data and operational status of traffic signal control equipment including operating condition and current indications are returned.
signal control status Operational and status data of traffic signal control equipment including operating condition and current indications.
track status Current status of the wayside equipment and notification of an arriving train.
traffic detector control Information used to configure and control traffic detector systems such as inductive loop detectors and machine vision sensors.
traffic detector coordination The direct flow of information between field equipment. This includes information used to configure and control traffic detector systems such as inductive loop detectors and machine vision sensors Raw and/or processed traffic detector data is returned that allows derivation of traffic flow variables (e.g., speed, volume, and density measures) and associated information (e.g., congestion, potential incidents). This flow includes the traffic data and the operational status of the traffic detectors
traffic detector data Raw and/or processed traffic detector data which allows derivation of traffic flow variables (e.g., speed, volume, and density measures) and associated information (e.g., congestion, potential incidents). This flow includes the traffic data and the operational status of the traffic detectors
traffic image meta data Meta data that describes traffic images. Traffic images (video) are in another flow.
traffic images High fidelity, real-time traffic images suitable for surveillance monitoring by the operator or for use in machine vision applications. This flow includes the images. Meta data that describes the images is contained in another flow.
vehicle location and motion Data describing the vehicle's location in three dimensions, heading, speed, acceleration, braking status, and size.
video surveillance control Information used to configure and control video surveillance systems.
video surveillance coordination The direct flow of information between field equipment. This includes information used to configure and control video surveillance systems and the high fidelity, real-time traffic images and associated meta data that are returned.

Goals and Objectives

Associated Planning Factors and Goals

Planning Factor Goal
B. Increase the safety of the transportation system for motorized and nonmotorized users; Reduce fatalities and injuries

Associated Objective Categories

Objective Category
Safety: Vehicle Crashes and Fatalities

Associated Objectives and Performance Measures

Objective Performance Measure
Reduce crashes at railroad crossings Number of crashes and fatalities at railroad crossings
Reduce crashes due to driver errors and limitations Number of crashes and fatalities related to driver inattention and distraction
Reduce crashes due to driver errors and limitations Number of crashes and fatalities related to driving while intoxicated
Reduce the number of motorcyclist fatalities by X percent by year Y. Number of motorcyclist fatalities
Reduce the number of pedestrian fatalities by X percent by year Y. Number of pedestrian fatalities
Reduce the number of speeding-related fatalities by X percent by year Y. Number of speeding-related fatalities
Reduce the rate fatalities in the region by X percent by year Y. Rate of fatalities (rate per vehicle miles travelled (VMT))
Reduce the rate of severe injuries in the region by X percent by year Y. Rate of serious injuries (rate per VMT)
Reduce the total number of crashes in the region by X percent by year Y. Total crashes per X VMT.
Reduce the total number of crashes involving bicyclists and pedestrians in the region by X percent by year Y. Total crashes involving bicycles.
Reduce the total number of crashes involving bicyclists and pedestrians in the region by X percent by year Y. Total crashes involving pedestrians.
Reduce the total number of fatalities and severe injuries in the region by X percent by year Y. Total fatalities per X VMT.
Reduce the total number of fatalities and severe injuries in the region by X percent by year Y. Total severe injuries per X VMT.
Reduce the total number of fatalities in the region by X percent by year Y. Number of fatalities
Reduce the total number of severe injuries in the region by X percent by year Y. Number of serious injuries

 
Since the mapping between objectives and service packages is not always straight-forward and often situation-dependent, these mappings should only be used as a starting point. Users should do their own analysis to identify the best service packages for their region.

Needs and Requirements

Need Functional Object Requirement
01 Traffic Operations need to be able to warn drivers of crossing closures or potential crash-imminent situations with a crossing or oncoming train in time for the driver to take appropriate action. Roadway Advanced Rail Crossing 02 The field element shall determine whether the highway-rail intersection (HRI) is blocked by traffic in the roadway or some other obstruction.
08 The field element shall control the dynamic message signs (DMS) in the vicinity of an advanced highway-rail intersection (HRI) to advise drivers, cyclists, and pedestrians of approaching trains.
RSE Rail Crossing Warning 01 The field element shall identify a train approaching or already in a highway rail intersection and activate warning signs to approaching motorists.
08 The field element shall receive commands from the controlling center that activate warning signs to approaching vehicles, pedestrians and non motorist vehicles.
09 The field element shall warn drivers of crossing closures due to oncoming trains.
11 The field element shall warn the driver of a potential crash at a railroad grade crossing.
12 The field element shall calculate whether the vehicle may approach the railroad intersection while a train is present in the intersection.
Vehicle Rail Crossing Warning 01 Vehicle shall receive alerts of trains entering HRIs and provide warnings to drivers regarding the trains.
02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching. Roadway Advanced Rail Crossing 07 The field element shall collect pedestrian images and pedestrian sensor data at advanced rail crossings and respond to pedestrian crossing requests via display, audio signal, or other manner.
10 The field element shall support the integrated control of adjacent traffic signals to clear an area in advance of an approaching train and to manage traffic around the advanced highway-rail intersection (HRI) .
Roadway Basic Surveillance 01 The field element shall collect, process, digitize, and send traffic sensor data (speed, volume, and occupancy) to the center for further analysis and storage, under center control.
02 The field element shall collect, process, and send traffic images to the center for further analysis and distribution.
04 The field element shall return sensor and CCTV system operational status to the controlling center.
Roadway Signal Control 01 The field element shall control traffic signals under center control.
01 The field element shall implement pre-preemption adjustments to signal timing when notified of preemption status changes at adjacent intersections.
02 The field element shall respond to pedestrian crossing requests by accommodating the pedestrian crossing.
03 The field element shall provide the capability to notify the traffic management center of pedestrian calls and pedestrian accommodations.
04 The field element shall report the current signal control information to the center.
05 The field element shall report current preemption status to the center.
06 The field element shall return traffic signal controller operational status to the center.
15 The field element shall receive requests for signal preemption.
Roadway Signal Preemption 01 The field element shall report current preemption status to other field elements at adjacent intersections.
02 The field element shall inform the controlling center when preemption requests have been received.
03 The field element shall send the preemption request to the signal controller to immediately preempt the signal for the requested direction.
RSE Rail Crossing Warning 10 The field element shall acquire railroad crossing intersection geometry information.
TMC Advanced Rail Crossing Management 02 The center shall accept collect highway-rail intersection (HRI) advisory or alert data from rail operations centers.
03 The center shall collect highway-rail intersection (HRI) equipment operational status and compare against the control information sent by the center.
04 The center shall provide the highway-rail intersection (HRI) equipment operational status to rail operations centers.
05 The center shall collect incident information related to a highway-rail intersection (HRI), such as intersection blockages or crashes or equipment malfunctions.
06 The center shall support control plans to coordinate signalized intersections around highway-rail intersections (HRI), under control of center personnel, based on data from sensors and surveillance monitoring traffic conditions, incidents, equipment faults, pedestrian crossings, etc.
TMC Basic Surveillance 02 The center shall monitor, analyze, and distribute traffic images from CCTV systems under remote control of the center.
TMC Signal Control 01 The center shall implement pre-preemption adjustments to signal timing at adjacent intersections to accommodate a signal preemption.
01 The center shall remotely control traffic signal controllers.
02 The center shall accept notifications of pedestrian calls.
03 The center shall collect traffic signal controller operational status and compare against the control information sent by the center.
05 The center shall manage (define, store and modify) control plans to coordinate signalized intersections, to be engaged at the direction of center personnel or according to a daily schedule.
06 The center shall implement control plans to coordinate signalized intersections based on data from sensors.
08 The center shall maintain traffic signal coordination including synchronizing clocks throughout the system.
10 The center shall adjust signal timing in response to a signal prioritization, signal preemption, pedestrian call, multi-modal crossing activation, or other requests for right-of-way.
03 Traffic Operations need to be able to know when an approaching or crossing train(s) will cross or is crossing the at-grade crossing. Roadway Advanced Rail Crossing 06 The field element shall receive track status and arriving train information from the rail wayside equipment that can be passed on to the traffic management center. This may include the current status of the tracks and when a train is expected and/or how long the crossing will be closed.
09 The field element shall close the highway-rail intersection (HRI) when a train is approaching with enough time for traffic to safely clear the crossing using gates, lights/signs, barriers, and traffic control signals.
TMC Advanced Rail Crossing Management 07 The center shall accept train schedules, maintenance schedules, and any other forecast events that will result in highway-rail intersection (HRI) closures data from rail operations centers.
04 Traffic Operations need to be able to alert and/or warn drivers who are approaching an at-grade railroad crossing if they are on a crash-imminent trajectory to collide with a crossing or approaching train. This enhanced information may be conveyed to the driver prior to, or in context with, warning system activation Personal Pedestrian Safety 02 The personal information device shall receive rail crossing warning information.
Roadway Advanced Rail Crossing 08 The field element shall control the dynamic message signs (DMS) in the vicinity of an advanced highway-rail intersection (HRI) to advise drivers, cyclists, and pedestrians of approaching trains.
RSE Rail Crossing Warning 02 The field element shall autonomously identify a train is approaching or already in the highway rail intersection and activate warning signs to approaching motorists.
04 The field element shall provide train arrival information to approaching vehicles.
Vehicle Rail Crossing Warning 01 Vehicle shall receive alerts of trains entering HRIs and provide warnings to drivers regarding the trains.
05 Traffic Operations need to be able to have detection capabilities that enable it to detect an entrapped or otherwise immobilized vehicle within the HRI and provide an immediate notification to highway and railroad officials. Roadway Advanced Rail Crossing 03 The field element shall notify the traffic management center and the rail wayside equipment of any intersection blockages, including trapped vehicles or other obstructions.
RSE Rail Crossing Warning 05 The field element shall monitor connected vehicles that may intrude on the crossing.
06 Traffic Operations need to be able to calculate an appropriate deceleration required to stop at the intersection given a collected set of data elements: road geometry, environmental road conditions, vehicle configuration data, and available telematics. Personal Pedestrian Safety 01 The personal information device shall provide the current location (latitude, longitude, and elevation) of the non-motorized travelers.
Roadway Advanced Rail Crossing 01 The field element shall collect and process, traffic sensor data in the vicinity of an advanced highway-rail intersection (HRI).
04 The field element shall monitor the status of the advanced highway-rail intersection (HRI) equipment, including both the current state and mode of operation and the current equipment condition, to be forwarded on to the traffic management center.
05 The field element shall monitor the status of the advanced highway-rail intersection (HRI) equipment, including both the current state and mode of operation and the current equipment condition, to be forwarded on to the rail wayside equipment.
11 The field element shall forward rail traffic advisories received from the Wayside Equipment at an advanced highway-rail intersection (HRI) to the traffic management center.
12 The field element shall provide approaching train advisories using field-vehicle communications to vehicles approaching the grade crossing.
RSE Rail Crossing Warning 03 The field element shall provide collected vehicle location information to the controlling center.
06 The field element shall provide collected pedestrians and other non motorist location information to the controlling center.
07 The field element shall collect the current status of the wayside equipment and notification of an arriving train.
TMC Advanced Rail Crossing Management 01 The center shall remotely control highway-rail intersection (HRI) equipment located in the field.

Related Sources

Document Name Version Publication Date
ITS User Services Document 1/1/2005
Connected Vehicle Safety Applications for Highway Rail Intersections (HRI) ConOps Draft 9/21/2012
Vehicle-to-Infrastructure (V2I) Safety Applications Concept of Operation Document Draft 8/10/2012
Vehicle-to-Infrastructure (V2I) Safety Applications System Requirements Document Final 3/8/2013
Vehicle-to-Infrastructure Rail Crossing Violation Warning Concept of Operations Draft 3/11/2015
Vehicle-to-Infrastructure Rail Crossing Violation Warning System Requirements Specification Draft 3/11/2015


Security

In order to participate in this service package, each physical object should meet or exceed the following security levels.

Physical Object Security
Physical Object Confidentiality Integrity Availability Security Class
Connected Vehicle Roadside Equipment Moderate High High Class 5
ITS Roadway Equipment Moderate High High Class 5
Other ITS Roadway Equipment Moderate Moderate Moderate Class 2
Personal Information Device Not Applicable High High Class 5
Rail Operations Center Moderate Moderate Moderate Class 2
Traffic Management Center Moderate High High Class 5
Vehicle Low High Moderate Class 3
Wayside Equipment Moderate High High Class 5



In order to participate in this service package, each information flow triple should meet or exceed the following security levels.

Information Flow Security
Source Destination Information Flow Confidentiality Integrity Availability
Basis Basis Basis
Connected Vehicle Roadside Equipment ITS Roadway Equipment intersection infringement info Low High Moderate
This data is also transmitted to those in the local vicinity via broadcast. This message is an indication of a potential hazard and should not be easy to forge. False messages here may lead to confusion that causes a traffic accident. This message is an indication of a potential hazard. If it isn't received it increases the risk to other road users. If a vehicle is infringing on an intersection, it must report this.
Connected Vehicle Roadside Equipment Personal Information Device arriving train information Not Applicable High High
Trains arriving should be visible, viewable and certainly not concealed. This flow forms the basis for providing data that, if incorrect, could lead to a catastrophic mistake. This flow forms the basis for providing data that, if incorrect, could lead to a catastrophic mistake. Since this flow can lead to other actions with other effects, HIGH is justifiable.
Connected Vehicle Roadside Equipment Personal Information Device rail crossing warning Not Applicable High Moderate
This is directly observable data. While there are other mechanisms for receiving this information, this data flow needs to be accurate lest a catastrophic mistake be made. While the data is critically important, there are other mechanisms for noting an approaching train (crossing gates, the train itself).
Connected Vehicle Roadside Equipment Traffic Management Center rail crossing application status Moderate Moderate Low
This information could be of interest to a malicious individual who is attempting to determine the best way to accomplish a crime. As such it would be best to not make it easily accessible. If this is compromised, it could send unnecessary maintenance workers, or cause the appearance of excessive traffic violations, leading to further unnecessary investigation. A delay in reporting this may cause a delay in necessary maintenance, but (a) this is not time-critical and (b) there are other channels for reporting malfunctioning. Additionally, there is a message received notification, which means that RSE can ensure that all intersection safety issues are delivered.
Connected Vehicle Roadside Equipment Vehicle arriving train information Not Applicable High Moderate
Trains arriving should be visible, viewable and certainly not concealed. While there are other mechanisms for receiving this information, this data flow needs to be accurate lest a catastrophic mistake be made. While the data is critically important, there are other mechanisms for noting an approaching train (crossing gates, the train itself).
Connected Vehicle Roadside Equipment Vehicle rail crossing warning Not Applicable High Moderate
This is directly observable data. While there are other mechanisms for receiving this information, this data flow needs to be accurate lest a catastrophic mistake be made. While the data is critically important, there are other mechanisms for noting an approaching train (crossing gates, the train itself).
Connected Vehicle Roadside Equipment Wayside Equipment rail crossing blockage notification Moderate High High
Contains information that may be predictive of a serious traffic/rail incident. For privacy purposes, this should probably not be advertised. Data predictive of potentially catastrophic incident needs to be correct so that appropriate actions are taken. This is a high priority to the vehicle blocking the HRI. Impact is not broad, but very severe. Hard to justify a MODERATE given the consequences.
Connected Vehicle Roadside Equipment Wayside Equipment rail crossing operational status Moderate Moderate Moderate
This information could be of interest to a malicious individual who is attempting to determine the best way to accomplish a crime. As such it would be best to not make it easily accessible. If this is compromised, it could send unnecessary maintenance workers, or suggest actions that are incorrect for the true situation. This information is important, but if it is not reported there are other safety systems that should prevent related incidents. The impact of any rail/road intersection is particularly high, but in this case a MODERATE rating can be justified by the alternative mechanisms.
ITS Roadway Equipment Connected Vehicle Roadside Equipment arriving train information Not Applicable High High
Trains arriving should be visible, viewable and certainly not concealed. This flow is an intermediate to the end user, but may also be used by an intermediary process for some other action. Regardless, it forms the basis for providing data that, if incorrect, could lead to a catastrophic mistake. This flow is an intermediate to the end user, but may also be used by an intermediary process for some other action. Regardless, it forms the basis for providing data that, if incorrect, could lead to a catastrophic mistake. Since this flow can lead to other actions with other effects, HIGH is justifiable.
ITS Roadway Equipment Connected Vehicle Roadside Equipment track status Low High High
Track status is typically physically viewable information. While this can be corroborated visually, the RSE may rely on this information to make safety-related decisions with significant consequences, so the data must be of high quality and readily available. While this can be corroborated visually, the RSE may rely on this information to make safety-related decisions with significant consequences, so the data must be of high quality and readily available.
ITS Roadway Equipment Driver driver information Not Applicable High Moderate
This data is sent to all drivers and is also directly observable, by design. This is the primary signal trusted by the driver to decide whether to go through the intersection and what speed to go through the intersection at; if it's wrong, accidents could happen. If the lights are out you have to get a policeman to direct traffic – expensive and inefficient and may cause a cascading effect due to lack of coordination with other intersections.
ITS Roadway Equipment MMV User crossing permission Not Applicable High Low
This data is intentionally transmitted to everyone via a broadcast. Although pedestrians have a responsibility to make sure the road is safe before they cross, they may react instinctively to incorrect information and be led to cross at unsafe times if they get incorrect information. Also, if the traffic signals are wrong and an accident happens, the pedestrian involved could sue, causing financial loss and other undesirable outcomes. It is easy to tell whether this information flow is available and pedestrians are used to using crosswalks that do not provide this service.
ITS Roadway Equipment Other ITS Roadway Equipment right-of-way request coordination Moderate Moderate Moderate
Any control flow has some confidentiality requirement, as observation of the flow may enable an attacker to analyze and learn how to assume control. MODERATE for most flows as the potential damage is likely contained, though anything that could have a significant safety impact may be assigned HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flows, even for seemingly innocent devices, should have MODERATE integrity at minimum, just to guarantee that intended control messages are received. Incorrect, corrupted, intercepted and modified control messages can or will result in target field devices not behaving according to operator intent. The severity of this depends on the type of device, which is why some devices are set MODERATE and some HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flow availability is related to the criticality of being able to remotely control the device. For most devices, this is MODERATE. For purely passive devices with no incident relationship, this will be LOW. All devices should have default modes that enable them to operate without backhaul connectivity, so no device warrants a HIGH.
ITS Roadway Equipment Other ITS Roadway Equipment signal control coordination Moderate Moderate Moderate
Any control flow has some confidentiality requirement, as observation of the flow may enable an attacker to analyze and learn how to assume control. MODERATE for most flows as the potential damage is likely contained, though anything that could have a significant safety impact may be assigned HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flows, even for seemingly innocent devices, should have MODERATE integrity at minimum, just to guarantee that intended control messages are received. Incorrect, corrupted, intercepted and modified control messages can or will result in target field devices not behaving according to operator intent. The severity of this depends on the type of device, which is why some devices are set MODERATE and some HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flow availability is related to the criticality of being able to remotely control the device. For most devices, this is MODERATE. For purely passive devices with no incident relationship, this will be LOW. All devices should have default modes that enable them to operate without backhaul connectivity, so no device warrants a HIGH.
ITS Roadway Equipment Other ITS Roadway Equipment traffic detector coordination Moderate Moderate Low
Any control flow has some confidentiality requirement, as observation of the flow may enable an attacker to analyze and learn how to assume control. MODERATE for most flows as the potential damage is likely contained, though anything that could have a significant safety impact may be assigned HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flows, even for seemingly innocent devices, should have MODERATE integrity at minimum, just to guarantee that intended control messages are received. Incorrect, corrupted, intercepted and modified control messages can or will result in target field devices not behaving according to operator intent. The severity of this depends on the type of device, which is why some devices are set MODERATE and some HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flow availability is related to the criticality of being able to remotely control the device. For most devices, this is MODERATE. For purely passive devices with no incident relationship, this will be LOW. All devices should have default modes that enable them to operate without backhaul connectivity, so no device warrants a HIGH.
ITS Roadway Equipment Other ITS Roadway Equipment video surveillance coordination Moderate Moderate Moderate
Any control flow has some confidentiality requirement, as observation of the flow may enable an attacker to analyze and learn how to assume control. MODERATE for most flows as the potential damage is likely contained, though anything that could have a significant safety impact may be assigned HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flows, even for seemingly innocent devices, should have MODERATE integrity at minimum, just to guarantee that intended control messages are received. Incorrect, corrupted, intercepted and modified control messages can or will result in target field devices not behaving according to operator intent. The severity of this depends on the type of device, which is why some devices are set MODERATE and some HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flow availability is related to the criticality of being able to remotely control the device. For most devices, this is MODERATE. For purely passive devices with no incident relationship, this will be LOW. All devices should have default modes that enable them to operate without backhaul connectivity, so no device warrants a HIGH.
ITS Roadway Equipment Pedestrian crossing permission Not Applicable High Low
This data is intentionally transmitted to everyone via a broadcast. Although pedestrians have a responsibility to make sure the road is safe before they cross, they may react instinctively to incorrect information and be led to cross at unsafe times if they get incorrect information. Also, if the traffic signals are wrong and an accident happens, the pedestrian involved could sue, causing financial loss and other undesirable outcomes. It is easy to tell whether this information flow is available and pedestrians are used to using crosswalks that do not provide this service.
ITS Roadway Equipment Traffic Management Center rail crossing blockage notification Moderate High High
Contains information that may be predictive of a serious traffic/rail incident. For privacy purposes, this should probably not be advertised. Data predictive of potentially catastrophic incident needs to be correct so that appropriate actions are taken. This is a high priority to the vehicle blocking the HRI. Impact is not broad, but very severe. Hard to justify a MODERATE given the consequences.
ITS Roadway Equipment Traffic Management Center rail crossing status Moderate Moderate Moderate
This information could be of interest to a malicious individual who is attempting to determine the best way to accomplish a crime. As such it would be best to not make it easily accessible. If this is compromised, it could send unnecessary maintenance workers, or suggest actions that are incorrect for the true situation. This information is important, but if it is not reported there are other safety systems that should prevent related incidents. The impact of any rail/road intersection is particularly high, but in this case a MODERATE rating can be justified by the alternative mechanisms.
ITS Roadway Equipment Traffic Management Center right-of-way request notification Low Moderate Moderate
This can be reasonably guessed based on observing the ITS RE's environment. It is obvious when a bus approaches an intersection. Invalid messages could lead to an unauthorized user gaining signal priority at an intersection. This could also be used to delay traffic, which could lead to a financial impact on the community. However, the traffic signal will have controls in place to ensure that it does not display an illegal configuration (such as green in every direction). Even if all of the Right-of-way Requests are not passed along from an ITS RE, the intersection will still operate as normal. There are other existing methods to assist a right-of-way requesting vehicle safely traveling through an intersection, such as lights and sirens, which prevent this from being a HIGH. DISC: THEA and NYC believe this to be LOW: "not necessary for the app to work; can cope with not having immediately available data"
ITS Roadway Equipment Traffic Management Center signal control status Low High Moderate
The current conditions of an ITS RE are completely observable, by design. This influences the TMC response to a right-of-way request. It should be as accurate as the right-of-way request themselves. For some applications (ISIG) this need only be moderate. Per THEA: info needs to be accurate and should not be tampered to enable effective monitoring and control by the TMC. DISC: THEA believes this to be MODERATE: "info needs to be accurate and should not be tampered to enable effective monitoring and control by the TMC; should be as accurate as the right of way request". NYC:TMC doesn't play an active role in this application, i.e. even if the information contained in this flow were incorrect, it is unlikely to affect the outcome of this application one way or the other. On some applications NYC has this MODERATE though. RES: This value can obviously change a lot depending on the application context. The TMC will need the current status of the ITS RE in order to make an educated decision. If it is unavailable, the system is unable to operate. However, a few missed messages will not have a catastrophic impact. From NYC: TMC doesn't play an active role in this application, i.e. even if it is unavailable, it is unlikely to affect the outcome of this application one way or the other. RES: This value can change a lot depending on the application context.
ITS Roadway Equipment Traffic Management Center traffic detector data Low Moderate Moderate
No impact if someone sees the data Some minimal guarantee of data integrity is necessary for all C-ITS flows. THEA believes this to be LOW.only limited adverse effect if raw/processed traffic detector data is bad/compromised; DISC: WYO believes this to be HIGH Only limited adverse effect of info is not timely/readily available, however without this information it will be difficult to perform traffic management activities, thus MODERATE. If not used for management, may be LOW.
ITS Roadway Equipment Traffic Management Center traffic image meta data Low Moderate Moderate
Traffic image data is generally intended for public consumption, and in any event is already video captured in the public arena, so this must be LOW. While accuracy of this data is important for decision making purposes, applications should be able to cfunction without it. Thus MODERATE generally. While accuracy of this data is important for decision making purposes, applications should be able to function without it. Thus MODERATE generally.
ITS Roadway Equipment Traffic Management Center traffic images Low Moderate Low
Traffic image data is generally intended for public consumption, and in any event is already video captured in the public arena, so this must be LOW. Generally transportation coordination information should be correct between source and destination, or inappropriate actions may be taken. While useful, there is no signficant impact if this flow is not available.
ITS Roadway Equipment Wayside Equipment rail crossing blockage notification Moderate High High
Contains information that may be predictive of a serious traffic/rail incident. For privacy purposes, this should probably not be advertised. Data predictive of potentially catastrophic incident needs to be correct so that appropriate actions are taken. This is a high priority to the vehicle blocking the HRI. Impact is not broad, but very severe. Hard to justify a MODERATE given the consequences.
ITS Roadway Equipment Wayside Equipment rail crossing operational status Moderate Moderate Moderate
This information could be of interest to a malicious individual who is attempting to determine the best way to accomplish a crime. As such it would be best to not make it easily accessible. If this is compromised, it could send unnecessary maintenance workers, or suggest actions that are incorrect for the true situation. This information is important, but if it is not reported there are other safety systems that should prevent related incidents. The impact of any rail/road intersection is particularly high, but in this case a MODERATE rating can be justified by the alternative mechanisms.
MMV User ITS Roadway Equipment crossing call Not Applicable High Low
The "Not Applicable" group includes information flows that do not actually carry information; for example, flows that represent the physical environment. Although pedestrians have a responsibility to make sure the road is safe before they cross, and should ensure that they are detected by pedestrian detection systems, they may not always be detected and be led to cross at unsafe times if the ITS RE obtains incorrect information. It is easy to tell whether this information flow is available and pedestrians are used to using crosswalks that do not provide this service.
Other ITS Roadway Equipment ITS Roadway Equipment right-of-way request coordination Moderate Moderate Moderate
Any control flow has some confidentiality requirement, as observation of the flow may enable an attacker to analyze and learn how to assume control. MODERATE for most flows as the potential damage is likely contained, though anything that could have a significant safety impact may be assigned HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flows, even for seemingly innocent devices, should have MODERATE integrity at minimum, just to guarantee that intended control messages are received. Incorrect, corrupted, intercepted and modified control messages can or will result in target field devices not behaving according to operator intent. The severity of this depends on the type of device, which is why some devices are set MODERATE and some HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flow availability is related to the criticality of being able to remotely control the device. For most devices, this is MODERATE. For purely passive devices with no incident relationship, this will be LOW. All devices should have default modes that enable them to operate without backhaul connectivity, so no device warrants a HIGH.
Other ITS Roadway Equipment ITS Roadway Equipment signal control coordination Moderate Moderate Moderate
Any control flow has some confidentiality requirement, as observation of the flow may enable an attacker to analyze and learn how to assume control. MODERATE for most flows as the potential damage is likely contained, though anything that could have a significant safety impact may be assigned HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flows, even for seemingly innocent devices, should have MODERATE integrity at minimum, just to guarantee that intended control messages are received. Incorrect, corrupted, intercepted and modified control messages can or will result in target field devices not behaving according to operator intent. The severity of this depends on the type of device, which is why some devices are set MODERATE and some HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flow availability is related to the criticality of being able to remotely control the device. For most devices, this is MODERATE. For purely passive devices with no incident relationship, this will be LOW. All devices should have default modes that enable them to operate without backhaul connectivity, so no device warrants a HIGH.
Other ITS Roadway Equipment ITS Roadway Equipment traffic detector coordination Moderate Moderate Low
Any control flow has some confidentiality requirement, as observation of the flow may enable an attacker to analyze and learn how to assume control. MODERATE for most flows as the potential damage is likely contained, though anything that could have a significant safety impact may be assigned HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flows, even for seemingly innocent devices, should have MODERATE integrity at minimum, just to guarantee that intended control messages are received. Incorrect, corrupted, intercepted and modified control messages can or will result in target field devices not behaving according to operator intent. The severity of this depends on the type of device, which is why some devices are set MODERATE and some HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flow availability is related to the criticality of being able to remotely control the device. For most devices, this is MODERATE. For purely passive devices with no incident relationship, this will be LOW. All devices should have default modes that enable them to operate without backhaul connectivity, so no device warrants a HIGH.
Other ITS Roadway Equipment ITS Roadway Equipment video surveillance coordination Moderate Moderate Moderate
Any control flow has some confidentiality requirement, as observation of the flow may enable an attacker to analyze and learn how to assume control. MODERATE for most flows as the potential damage is likely contained, though anything that could have a significant safety impact may be assigned HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flows, even for seemingly innocent devices, should have MODERATE integrity at minimum, just to guarantee that intended control messages are received. Incorrect, corrupted, intercepted and modified control messages can or will result in target field devices not behaving according to operator intent. The severity of this depends on the type of device, which is why some devices are set MODERATE and some HIGH. Since this directly impacts device control, we consider it the same as a control flow. Control flow availability is related to the criticality of being able to remotely control the device. For most devices, this is MODERATE. For purely passive devices with no incident relationship, this will be LOW. All devices should have default modes that enable them to operate without backhaul connectivity, so no device warrants a HIGH.
Pedestrian ITS Roadway Equipment crossing call Not Applicable High Low
The "Not Applicable" group includes information flows that do not actually carry information; for example, flows that represent the physical environment. Although pedestrians have a responsibility to make sure the road is safe before they cross, and should ensure that they are detected by pedestrian detection systems, they may not always be detected and be led to cross at unsafe times if the ITS RE obtains incorrect information. It is easy to tell whether this information flow is available and pedestrians are used to using crosswalks that do not provide this service.
Personal Information Device Connected Vehicle Roadside Equipment personal location Not Applicable High Moderate
This data is intentionally transmitted to everyone via a broadcast. It can also be determined via other visual indicators. An incorrect location message could lead to a false warning or lack of warning. A lack of warning can have obvious catastrophic consequences, while a false warning could lead to users ignoring warnings due to perceived inaccuracy. Given that this triple may apply to highly dynamic environments (such as work zones), its accuracy is paramount, and thus if sent, must have HIGH integrity. There are other visual indicators about the geofenced areas. PID users in dynamic environments (incident and work zones) should know when they are leaving a geofenced area. As long as they remain in the geofenced area, this information is not as necessary. Not all pedestrians will carry a personal information device, and the system should be able to operate without this information.
Personal Information Device MMV User personal updates Not Applicable Moderate Moderate
This data is informing the pedestrian about the safety of the intersections. It should not contain anything sensitive, and does not matter if another person can observe it. This is the information that is presented to the individual. If they receive incorrect information, they may act in an unsafe manner. However, there are other indicators that would alert them to any hazards, such as an oncoming vehicle or crossing safety lights. If this information is not made available to the pedestrian, then the system has not operated correctly.
Personal Information Device Pedestrian personal updates Not Applicable Moderate Moderate
This data is informing the pedestrian about the safety of the intersections. It should not contain anything sensitive, and does not matter if another person can observe it. This is the information that is presented to the individual. If they receive incorrect information, they may act in an unsafe manner. However, there are other indicators that would alert them to any hazards, such as an oncoming vehicle or crossing safety lights. If this information is not made available to the pedestrian, then the system has not operated correctly.
Traffic Management Center Connected Vehicle Roadside Equipment rail crossing application info Moderate Moderate Low
This information could be of interest to a malicious individual who is attempting to determine the best way to accomplish a crime. As such it would be best to not make it easily accessible. If this is compromised, it could send unnecessary maintenance workers, or cause the appearance of excessive traffic violations, leading to further unnecessary investigation. A delay in reporting this may cause a delay in necessary maintenance, but (a) this is not time-critical and (b) there are other channels for reporting malfunctioning. Additionally, there is a message received notification, which means that RSE can ensure that all intersection safety issues are delivered.
Traffic Management Center ITS Roadway Equipment rail crossing control data Moderate High Moderate
Control flows, even for seemingly innocent devices, should be kept confidential to minimize attack vectors. While an individual installation may not be particularly impacted by a cyberattack of its sensor network, another installation might be severely impacted, and different installations are likely to use similar methods, so compromising one leads to compromising all. Control flows, even for seemingly innocent devices, should have MODERATE integrity at minimum, just to guarantee that intended control messages are received. Incorrect, corrupted, intercepted and modified control messages can or will result in target field devices not behaving according to operator intent. The severity of this depends on the type of device, which is why some devices are set MODERATE and some HIGH. Control flow availability is related to the criticality of being able to remotely control the device. For most devices, this is MODERATE. For purely passive devices with no incident relationship, this will be LOW. All devices should have default modes that enable them to operate without backhaul connectivity, so no device warrants a HIGH.
Traffic Management Center ITS Roadway Equipment rail crossing request Moderate Moderate Moderate
This information could be of interest to a malicious individual who is attempting to determine the best way to accomplish a crime. As such it would be best to not make it easily accessible. If this is compromised, it could send unnecessary maintenance workers, or suggest actions that are incorrect for the true situation. This information is important, but if it is not reported there are other safety systems that should prevent related incidents. The impact of any rail/road intersection is particularly high, but in this case a MODERATE rating can be justified by the alternative mechanisms.
Traffic Management Center ITS Roadway Equipment signal control commands Moderate High Moderate
Control flows, even for seemingly innocent devices, should be kept confidential to minimize attack vectors. While an individual installation may not be particularly impacted by a cyberattack of its sensor network, another installation might be severely impacted, and different installations are likely to use similar methods, so compromising one leads to compromising all. DISC: NYC believes this to be LOW: "The result of this will be directly observable." Invalid messages could lead to an unauthorized user gaining control of an intersection. This could also be used to bring traffic to a standstill, which could lead to a large financial impact on the community. DISC: NYC believes this to be MODERATE: The signal timing is critical to the intersection operation; incorrect signal timing can lead to significant congestion and unreliable operation; while unsafe operation is controlled by the cabinet monitoring system, attackers could "freeze" the signal or call a preemption. RES: This will vary depending on the application and implementation. These messages are important to help with preemption and signal priority applications. Without them, these applications mayl not work. However, if these signals are not received, the ITS RE will continue to function using its default configuration. The TMC should have an acknowledgement of the receipt of a message. DISC: NYC blieves this to be LOW: TMC doesn't play an active role in this application, i.e. even if it is unavailable, it is unlikely to affect the outcome of this application one way or the other.
RES: This will vary depending on the application and implementation.
Traffic Management Center ITS Roadway Equipment traffic detector control Moderate Moderate Low
Control flows, even for seemingly innocent devices, should be kept confidential to minimize attack vectors. While an individual installation may not be particularly impacted by a cyberattack of its sensor network, another installation might be severely impacted, and different installations are likely to use similar methods, so compromising one leads to compromising all. DISC: THEA, WYO believe this to be LOW: encrypted, authenticated, proprietary; but should not cause severe damage if seen Control flows, even for seemingly innocent devices, should have MODERATE integrity at minimum, just to guarantee that intended control messages are received. Incorrect, corrupted, intercepted and modified control messages can or will result in target field devices not behaving according to operator intent. The severity of this depends on the type of device, which is why some devices are set MODERATE and some HIGH.. From THEA: should be accurate and not be tampered with; could enable outside control of traffic sensors but should not cause severe harm, but could cause issues with traffic sensor data received and be detrimental to operations Control flow availability is related to the criticality of being able to remotely control the device. For most devices, this is MODERATE. For purely passive devices with no incident relationship, this will be LOW. All devices should have default modes that enable them to operate without backhaul connectivity, so no device warrants a HIGH.. From THEA: want updates but delayed information will not be severe; should be able to operate from a previous/default control/config. DISC: WYO believes this to be MODERATE
Traffic Management Center ITS Roadway Equipment video surveillance control Moderate Moderate Moderate
Control flows, even for seemingly innocent devices, should be kept confidential to minimize attack vectors. While an individual installation may not be particularly impacted by a cyberattack of its sensor network, another installation might be severely impacted, and different installations are likely to use similar methods, so compromising one leads to compromising all. Control flows, even for seemingly innocent devices, should have MODERATE integrity at minimum, just to guarantee that intended control messages are received. Incorrect, corrupted, intercepted and modified control messages can or will result in target field devices not behaving according to operator intent. The severity of this depends on the type of device, which is why some devices are set MODERATE and some HIGH. Control flow availability is related to the criticality of being able to remotely control the device. For most devices, this is MODERATE. For purely passive devices with no incident relationship, this will be LOW. All devices should have default modes that enable them to operate without backhaul connectivity, so no device warrants a HIGH.
Traffic Management Center Rail Operations Center rail crossing advisories Moderate Moderate Moderate
May contain sensitive information about the highway-rail intersection area. If intercepted by a third party, could be used to embarras the relevant stakeholders, or as contributing information toward target selection (if for example a piece of monitoring equipment was listed as non-functional). This will trigger maintenance activity, so it must be correct or such activities will not be properly scheduled and resources suboptimally assgned. If unavailable or modified, may negatively contribute to mobility and safety. This will trigger maintenance activity, so it must be correct or such activities will not be properly scheduled and resources suboptimally assgned. If unavailable or modified, may negatively contribute to mobility and safety.
Vehicle Connected Vehicle Roadside Equipment intersection infringement info Low High Moderate
This data is intentionally transmitted to everyone via a broadcast. It can also be determined via other visual indicators. This message is an indication of a potential hazard and should not be easy to forge. False messages here may lead to confusion that causes a traffic accident. This message is an indication of a potential hazard. If it isn't received it increases the risk to other road users. If a vehicle is infringing on an intersection, it must report this.
Vehicle Connected Vehicle Roadside Equipment vehicle location and motion Not Applicable High Moderate
This data is intentionally transmitted to everyone via a broadcast. Much of its information content can also be determined via other visual indicators Incorrect information could lead to the system not operating properly. If the system does not properly know where the vehicle is, it cannot make an accurate decision about whether there is going to be a pedestrian in the crosswalk that the vehicle is approaching. This can have a safety impact.; DISC: NYC believes this to be MODERATE This data is required for the system to operate properly. If this data is not available, the system cannot give accurate warning information.
Vehicle Driver driver updates Not Applicable Moderate Moderate
This data is informing the driver about the safety of a nearby area. It should not contain anything sensitive, and does not matter if another person can observe it. This is the information that is presented to the driver. If they receive incorrect information, they may act in an unsafe manner. However, there are other indicators that would alert them to any hazards, such as an oncoming vehicle or crossing safety lights. If this information is not made available to the driver, then the system has not operated correctly.
Wayside Equipment Connected Vehicle Roadside Equipment arriving train information Not Applicable High High
Trains arriving should be visible, viewable and certainly not concealed. This flow is an intermediate to the end user, but may also be used by an intermediary process for some other action. Regardless, it forms the basis for providing data that, if incorrect, could lead to a catastrophic mistake. This flow is an intermediate to the end user, but may also be used by an intermediary process for some other action. Regardless, it forms the basis for providing data that, if incorrect, could lead to a catastrophic mistake. Since this flow can lead to other actions with other effects, HIGH is justifiable.
Wayside Equipment Connected Vehicle Roadside Equipment track status Low Moderate Moderate
Track status is typically physically viewable information. This information is important, but if it is incorrecct there are other safety systems that should prevent related incidents. The impact of any rail/road intersection is particularly high, but in this case a MODERATE rating can be justified by the alternative mechanisms. This information is important, but if it is not reported there are other safety systems that should prevent related incidents. The impact of any rail/road intersection is particularly high, but in this case a MODERATE rating can be justified by the alternative mechanisms.
Wayside Equipment ITS Roadway Equipment arriving train information Not Applicable High High
Trains arriving should be visible, viewable and certainly not concealed. This flow is an intermediate to the end user, but may also be used by an intermediary process for some other action. Regardless, it forms the basis for providing data that, if incorrect, could lead to a catastrophic mistake. This flow is an intermediate to the end user, but may also be used by an intermediary process for some other action. Regardless, it forms the basis for providing data that, if incorrect, could lead to a catastrophic mistake. Since this flow can lead to other actions with other effects, HIGH is justifiable.
Wayside Equipment ITS Roadway Equipment track status Low Moderate Moderate
Track status is typically physically viewable information. This information is important, but if it is incorrect there are other safety systems that should prevent related incidents. The impact of any rail/road intersection is particularly high, but in this case a MODERATE rating can be justified by the alternative mechanisms. This information is important, but if it is not reported there are other safety systems that should prevent related incidents. The impact of any rail/road intersection is particularly high, but in this case a MODERATE rating can be justified by the alternative mechanisms.

Standards

The following table lists the standards associated with physical objects in this service package. For standards related to interfaces, see the specific information flow triple pages.

Name Title Physical Object
CTI 4001 RSU Roadside Unit (RSU) Standard Connected Vehicle Roadside Equipment
ITE 5201 ATC Advanced Transportation Controller ITS Roadway Equipment
ITE 5202 ATC Model 2070 Model 2070 Controller Standard ITS Roadway Equipment
ITE 5301 ATC ITS Cabinet Intelligent Transportation System Standard Specification for Roadside Cabinets ITS Roadway Equipment
ITE 5401 ATC API Application Programming Interface Standard for the Advanced Transportation Controller ITS Roadway Equipment
NEMA TS 8 Cyber and Physical Security Cyber and Physical Security for Intelligent Transportation Systems ITS Roadway Equipment
Traffic Management Center
NEMA TS2 Traffic Controller Assemblies Traffic Controller Assemblies with NTCIP Requirements ITS Roadway Equipment




System Requirements

System Requirement Need
001 The system shall remotely control highway-rail intersection (HRI) equipment located in the field. 06 Traffic Operations need to be able to calculate an appropriate deceleration required to stop at the intersection given a collected set of data elements: road geometry, environmental road conditions, vehicle configuration data, and available telematics.
002 The system shall accept collect highway-rail intersection (HRI) advisory or alert data from rail operations centers. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
003 The system shall collect highway-rail intersection (HRI) equipment operational status and compare against the control information sent by the center. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
004 The system shall provide the highway-rail intersection (HRI) equipment operational status to rail operations centers. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
005 The system shall collect incident information related to a highway-rail intersection (HRI), such as intersection blockages or crashes or equipment malfunctions. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
006 The system shall implement control plans to coordinate signalized intersections around highway-rail intersections (HRI), under control of center personnel, based on data from sensors and surveillance monitoring traffic conditions, incidents, equipment faults, pedestrian crossings, etc. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
007 The system shall accept train schedules, maintenance schedules, and any other forecast events that will result in highway-rail intersection (HRI) closures data from rail operations centers. 03 Traffic Operations need to be able to know when an approaching or crossing train(s) will cross or is crossing the at-grade crossing.
008 The system shall monitor, analyze, and distribute traffic images from CCTV systems under remote control of the center. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
009 The system shall implement pre-preemption adjustments to signal timing at adjacent intersections to accommodate a signal preemption. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
010 The system shall collect and process, traffic sensor data in the vicinity of an advanced highway-rail intersection (HRI). 06 Traffic Operations need to be able to calculate an appropriate deceleration required to stop at the intersection given a collected set of data elements: road geometry, environmental road conditions, vehicle configuration data, and available telematics.
011 The system shall determine whether the highway-rail intersection (HRI) is blocked by traffic in the roadway or some other obstruction. 01 Traffic Operations need to be able to warn drivers of crossing closures or potential crash-imminent situations with a crossing or oncoming train in time for the driver to take appropriate action.
012 The system shall implement pre-preemption adjustments to signal timing at adjacent intersections to accommodate a signal preemption. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
013 The system shall remotely control traffic signal controllers. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
014 The system shall notify the traffic management center and the rail wayside equipment of any intersection blockages, including trapped vehicles or other obstructions. 05 Traffic Operations need to be able to have detection capabilities that enable it to detect an entrapped or otherwise immobilized vehicle within the HRI and provide an immediate notification to highway and railroad officials.
015 The system shall accept notifications of pedestrian calls. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
016 The system shall monitor the status of the advanced highway-rail intersection (HRI) equipment, including both the current state and mode of operation and the current equipment condition, to be forwarded on to the traffic management center. 06 Traffic Operations need to be able to calculate an appropriate deceleration required to stop at the intersection given a collected set of data elements: road geometry, environmental road conditions, vehicle configuration data, and available telematics.
017 The system shall monitor the status of the advanced highway-rail intersection (HRI) equipment, including both the current state and mode of operation and the current equipment condition, to be forwarded on to the rail wayside equipment. 06 Traffic Operations need to be able to calculate an appropriate deceleration required to stop at the intersection given a collected set of data elements: road geometry, environmental road conditions, vehicle configuration data, and available telematics.
018 The system shall collect traffic signal controller operational status and compare against the control information sent by the center. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
019 The system shall manage (define, store and modify) control plans to coordinate signalized intersections, to be engaged at the direction of center personnel or according to a daily schedule. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
020 The system shall receive track status and arriving train information from the rail wayside equipment that can be passed on to the traffic management center. This may include the current status of the tracks and when a train is expected and/or how long the crossing will be closed. 03 Traffic Operations need to be able to know when an approaching or crossing train(s) will cross or is crossing the at-grade crossing.
021 The system shall collect pedestrian images and pedestrian sensor data at advanced rail crossings and respond to pedestrian crossing requests via display, audio signal, or other manner. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
022 The system shall implement control plans to coordinate signalized intersections based on data from sensors. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
023 The system shall control the dynamic message signs (DMS) in the vicinity of an advanced highway-rail intersection (HRI) to advise drivers, cyclists, and pedestrians of approaching trains. 01 Traffic Operations need to be able to warn drivers of crossing closures or potential crash-imminent situations with a crossing or oncoming train in time for the driver to take appropriate action.
04 Traffic Operations need to be able to alert and/or warn drivers who are approaching an at-grade railroad crossing if they are on a crash-imminent trajectory to collide with a crossing or approaching train. This enhanced information may be conveyed to the driver prior to, or in context with, warning system activation
024 The system shall maintain traffic signal coordination including synchronizing clocks throughout the system. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
025 The system shall adjust signal timing in respond to a signal prioritization, signal preemption, pedestrian call, multi-modal crossing activation, or other requests for right-of-way. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
026 The system shall close the highway-rail intersection (HRI) when a train is approaching with enough time for traffic to safely clear the crossing using gates, lights/signs, barriers, and traffic control signals. 03 Traffic Operations need to be able to know when an approaching or crossing train(s) will cross or is crossing the at-grade crossing.
027 The system shall support the integrated control of adjacent traffic signals to clear an area in advance of an approaching train and to manage traffic around the advanced highway-rail intersection (HRI) . 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
028 The system shall forward rail traffic advisories received from the Wayside Equipment at an advanced highway-rail intersection (HRI) to the traffic management center. 06 Traffic Operations need to be able to calculate an appropriate deceleration required to stop at the intersection given a collected set of data elements: road geometry, environmental road conditions, vehicle configuration data, and available telematics.
029 The system shall provide approaching train advisories using field-vehicle communications to vehicles approaching the grade crossing. 06 Traffic Operations need to be able to calculate an appropriate deceleration required to stop at the intersection given a collected set of data elements: road geometry, environmental road conditions, vehicle configuration data, and available telematics.
030 The system shall identify a train approaching or already in a highway rail intersection and activate warning signs to approaching motorists. 01 Traffic Operations need to be able to warn drivers of crossing closures or potential crash-imminent situations with a crossing or oncoming train in time for the driver to take appropriate action.
031 The system shall collect, process, digitize, and send traffic sensor data (speed, volume, and occupancy) to the center for further analysis and storage, under center control. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
032 The system shall autonomously identify a train is approaching or already in the highway rail intersection and activate warning signs to approaching motorists. 04 Traffic Operations need to be able to alert and/or warn drivers who are approaching an at-grade railroad crossing if they are on a crash-imminent trajectory to collide with a crossing or approaching train. This enhanced information may be conveyed to the driver prior to, or in context with, warning system activation
033 The system shall collect, process, and send traffic images to the center for further analysis and distribution. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
034 The system shall provide collected vehicle location information to the controlling center. 06 Traffic Operations need to be able to calculate an appropriate deceleration required to stop at the intersection given a collected set of data elements: road geometry, environmental road conditions, vehicle configuration data, and available telematics.
035 The system shall return sensor and CCTV system operational status to the controlling center. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
036 The system shall provide train arrival information to approaching vehicles. 04 Traffic Operations need to be able to alert and/or warn drivers who are approaching an at-grade railroad crossing if they are on a crash-imminent trajectory to collide with a crossing or approaching train. This enhanced information may be conveyed to the driver prior to, or in context with, warning system activation
037 The system shall monitor connected vehicles that may intrude on the crossing. 05 Traffic Operations need to be able to have detection capabilities that enable it to detect an entrapped or otherwise immobilized vehicle within the HRI and provide an immediate notification to highway and railroad officials.
038 The system shall implement pre-preemption adjustments to signal timing when notified of preemption status changes at adjacent intersections. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
039 The system shall provide collected pedestrians and other non motorist location information to the controlling center. 06 Traffic Operations need to be able to calculate an appropriate deceleration required to stop at the intersection given a collected set of data elements: road geometry, environmental road conditions, vehicle configuration data, and available telematics.
040 The system shall collect the current status of the wayside equipment and notification of an arriving train. 06 Traffic Operations need to be able to calculate an appropriate deceleration required to stop at the intersection given a collected set of data elements: road geometry, environmental road conditions, vehicle configuration data, and available telematics.
041 The system shall receive commands from the controlling center that activate warning signs to approaching vehicles, pedestrians and non motorist vehicles. 01 Traffic Operations need to be able to warn drivers of crossing closures or potential crash-imminent situations with a crossing or oncoming train in time for the driver to take appropriate action.
042 The system shall warn drivers of crossing closures due to oncoming trains. 01 Traffic Operations need to be able to warn drivers of crossing closures or potential crash-imminent situations with a crossing or oncoming train in time for the driver to take appropriate action.
043 The system shall acquire railroad crossing intersection geometry information. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
044 The system shall implement pre-preemption adjustments to signal timing when notified of preemption status changes at adjacent intersections. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
045 The system shall control traffic signals under center control. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
046 The system shall report current preemption status to other field elements at adjacent intersections. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
047 The system shall warn the driver of a potential crash at a railroad grade crossing. 01 Traffic Operations need to be able to warn drivers of crossing closures or potential crash-imminent situations with a crossing or oncoming train in time for the driver to take appropriate action.
048 The system shall respond to pedestrian crossing requests by accommodating the pedestrian crossing. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
049 The system shall calculate whether the vehicle may approach the railroad intersection while a train is present in the intersection. 01 Traffic Operations need to be able to warn drivers of crossing closures or potential crash-imminent situations with a crossing or oncoming train in time for the driver to take appropriate action.
050 The system shall provide the current location (latitude, longitude, and elevation) of the non-motorized travelers. 06 Traffic Operations need to be able to calculate an appropriate deceleration required to stop at the intersection given a collected set of data elements: road geometry, environmental road conditions, vehicle configuration data, and available telematics.
051 The system shall provide the capability to notify the traffic management center of pedestrian calls and pedestrian accommodations. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
052 The system shall report the current signal control information to the center. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
053 The system shall receive rail crossing warning information. 04 Traffic Operations need to be able to alert and/or warn drivers who are approaching an at-grade railroad crossing if they are on a crash-imminent trajectory to collide with a crossing or approaching train. This enhanced information may be conveyed to the driver prior to, or in context with, warning system activation
054 The system shall receive alerts of trains entering HRIs and provide warnings to drivers regarding the trains. 04 Traffic Operations need to be able to alert and/or warn drivers who are approaching an at-grade railroad crossing if they are on a crash-imminent trajectory to collide with a crossing or approaching train. This enhanced information may be conveyed to the driver prior to, or in context with, warning system activation
01 Traffic Operations need to be able to warn drivers of crossing closures or potential crash-imminent situations with a crossing or oncoming train in time for the driver to take appropriate action.
055 The system shall report current preemption status to the center. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
056 The system shall return traffic signal controller operational status to the center. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
057 The system shall receive requests for emergency vehicle signal preemption. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
058 The system shall report current preemption status to other field elements at adjacent intersections. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
059 The system shall inform the controlling center when preemption requests have been received. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.
060 The system shall send the preemption request to the signal controller to immediately preempt the signal for the requested direction. 02 Traffic Operations need to be able to modify traffic signal timing in order to allow safe and efficient movement of vehicles away or towards an advanced highway rail intersection when a train is approaching.