Roadside Equipment --> ITS Roadway Equipment:
traffic situation data

Definitions

traffic situation data (Information Flow): Current, aggregate traffic data collected from connected vehicles that can be used to supplement or replace information collected by roadside traffic detectors. It includes raw and/or processed reported vehicle speeds, counts, and other derived measures. Raw and/or filtered vehicle control events may also be included to support incident detection.

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:

• Cooperative Adaptive Cruise Control
• Eco-Cooperative Adaptive Cruise Control
• Eco-Ramp Metering
• Eco-Speed Harmonization
• Eco-Traffic Signal Timing
• Incident Scene Work Zone Alerts for Drivers and Workers
• Intelligent Traffic Signal System
• Queue Warning
• Roadside Lighting
• Speed Harmonization
• Stop Sign Gap Assist
• Variable Speed Limits for Weather-Responsive Traffic Management
• Warnings about Hazards in a Work Zone

This Information Flow is in the following Application Objects:

• Roadway Basic Surveillance
• Roadway Lighting System Control
• Roadway Traffic Gap Assist
• Roadway Work Zone Safety
• RSE Traffic Gap Assist
• RSE Traffic Monitoring
• RSE Work Zone Safety

Communication Diagrams

The communication diagram(s) can be viewed in SVG or PNG format and the current format is SVG. Switch to SVG format. PNG format.

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:

Security

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