METR Regulation System --> METR Verification System:
unverified METR information

Definitions

unverified METR information (Information Flow): This flow requests the verification of an item of METR information by an independent METR Verification Center.

METR Regulation System (Source Physical Object): The 'METR Regulation System' creates and maintains electronic versions of traffic regulations for eventual consumption by traveler systems and other interested parties. Once approved, each rule is signed and traceable to a specific Rule-Maker. Depending on local policies and division of labor, the METR Regulation Center might need to coordinate with a METR Verification Center, a Maintenance and Construction Management System, and METR Discrepancy Handling Centers.

METR Verification System (Destination Physical Object): The 'METR Verification System' is responsible for providing independent verification of the rules defined by a METR Regulation System. It is represented as a distinct physical object since the verification is intended to be independently performed.

Included In

This Triple is in the following Service Packages:

  • None

This triple is associated with the following Functional Objects:

  • None

This Triple is described by the following Functional View Data Flows:

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This Triple has the following triple relationships:

None

Communication Solutions

Solutions are sorted in ascending Gap Severity order. The Gap Severity is the parenthetical number at the end of the solution.

Selected Solution

METR: Regulation Requirements - Secure Internet (ITS)

Solution Description

This solution is used within the E.U. and the U.S.. It combines standards associated with METR: Regulation Requirements with those for I-I: Secure Internet (ITS). The METR: Regulation Requirements standards include upper-layer standards required to exchange traffic regulations with a regulatory center. The I-I: Secure Internet (ITS) standards include lower-layer standards that support secure communications between ITS equipment using X.509 or IEEE 1609.2 security certificates.

ITS Application Entity
Mind the gapMind the gap

ISO 24315-4
ISO 24315-8
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Mgmt
Facilities
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Security
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Note that some layers might have alternatives, in which case all of the gap icons associated with every alternative may be shown on the diagram, but the solution severity calculations (and resulting ordering of solutions) includes only the issues associated with the default (i.e., best, least severe) alternative.

Characteristics

Characteristic Value
Time Context Recent
Spatial Context Regional
Acknowledgement True
Cardinality Unicast
Initiator Source
Authenticable True
Encrypt True


Interoperability Description
Regional Interoperability throughout the geopolitical region is highly desirable, but if implemented differently in different transportation management jurisdictions, significant benefits will still accrue in each jurisdiction. Regardless, this Information Flow Triple should be implemented consistently within a transportation jurisdiction (i.e., the scope of a regional architecture).

Security

Information Flow Security
  Confidentiality Integrity Availability
Rating Moderate High Moderate
Basis May have some PII for internal actors in the METR system, which should not be observed as they could be used as part of phishing or related attacks. Rules could be used to guide vehicle behavior, and if incorrect could lead to vehicles breaking actual rules with potentially highly damaging consequences. Updates are probably infrequent so often this flow can be a less than HIGH availability. In cases of high update (e.g., work zones, incidents), it could be HIGH.


Security Characteristics Value
Authenticable True
Encrypt True