Link Type: Field to Field

ITS Roadway Equipment --> Roadside Equipment:
conflict monitor status

Definitions

conflict monitor status (Information Flow): A control flow that supports failsafe operation in the event that a conflict is detected that requires the RSE to enter a failsafe operating mode.

ITS Roadway Equipment (Source Physical Object): '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 itself. In CVRIA, this physical object represents all of the other ITS field equipment that interfaces with and supports the Connected Vehicle Roadside Equipment (RSE). 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.

Roadside Equipment (Destination Physical Object): 'Roadside Equipment' (RSE) represents the Connected Vehicle roadside devices that are used to send messages to, and receive messages from, nearby vehicles using Dedicated Short Range Communications (DSRC) or other alternative wireless communications technologies. 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.

Communication Diagrams

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This profile describes standards applicable to communications between roadside equipment and other field equipment such as traffic signal controllers that is represented by ITS Roadway Equipment in CVRIA.





Characteristics

Architectural:

Characteristic Value
Time Context Now
Spatial Context Adjacent
Acknowledgement False
Cardinality Unicast
Initiator Source

Security

This information flow triple is in the following applications with the following security levels.

Information Flow Security
Application Confidentiality Integrity Availability
Basis Basis Basis
Pedestrian in Signalized Crosswalk Warning Low Moderate Moderate
This information could be ascertained by examining the signal states, and so is effectively broadcast. If this is compromised, it could send incorrect data to the RSE. Since the data contained herein directly affects human safety, the RSE may react to modify its outputs, at the least disabling related outputs. Not 'High' because the signal state is also present. A delay in reporting this may allow the RSE to distribute faulty information, but that information is contradicted by the signal state. Since there are multiple pathways for the information to be obtained, this is not 'High.'