Roadway Transit Signal Control

Overview

'Roadway Transit Signal Control' includes the field elements that manage transit signals that are used when transit lanes or transit vehicles in mixed-traffic lanes have exclusive phases, including on transit lanes, transitways, or when a signal is used to give the transit vehicle a queue jump in mixed-traffic. These signals are visually distinct and positioned away from standard traffic control signal indications so they are not acted on by other road users. It includes the traffic signal controllers, detectors, conflict monitors, transit signal heads, and other ancillary equipment that supports transit signal control on mixed use alignments. The transit signal control may be separate and interconnected with the intersection control or integrated with overall intersection control (see Roadway Signal Control).

This functional object is included in the "ITS Roadway Equipment" physical object.

This functional object is included in the following service packages:

• PT09: Transit Signal Priority

This functional object is mapped to the following Functional View PSpecs:

• 1.1.1.1: Process Traffic Sensor Data
• 1.2.7.1: Process Indicator Output Data for Roads
• 1.6.1.1: Detect Roadway Events
• 1.6.1.2.1: Control HRI Traffic Signals
• 1.6.1.2.2: Control HRI Warnings and Barriers
• 1.6.1.2.3: Provide SSR Device Controls
• 1.6.1.2.5: Manage Device Control
• 1.6.1.2.6: Maintain Device State
• 1.6.3.1: Interact with Wayside Systems

Requirements

Information Flows

Standards

Currently, there are no standards associated with the functional object itself though the interfaces may have standards associated with them.