Link Type: Field to Field

Roadside Equipment --> ITS Roadway Equipment:
pedestrian location information


pedestrian location information (Information Flow): Pedestrian locations at an intersection as detected and reported by an RSE.

Roadside Equipment (Source 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.

ITS Roadway Equipment (Destination 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.

Included In

This Information Flow is in the following Applications:

This Information Flow is in the following Application Objects:

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.



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


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 Not Applicable Moderate Low
This is simply passing on received broadcast messages. It is intended to be received by everyone. We assume that this information is not able to cause the ITS RE to behave in extreme ways, e.g. to keep all the lights red forever because it thinks there's a baby in the middle of the road. In other words, the ITS RE has maximum durations for the different phases of the cycle which it will not go beyond not matter what this information flow contains. Bad information can cause annoyances and disrupt traffic flow to a limited extent but will not have a large impact. If this is down, the ITS RE goes back to default behavior, which we assume is set sensibly.