Functional Area: Roadway Basic Surveillance |
- The field element shall collect, process, digitize, and send traffic sensor data (speed, volume, and occupancy) to the center for further analysis and storage, under center control.
- The field element shall collect, process, and send traffic images to the center for further analysis and distribution.
- The field element shall collect, digitize, and send multimodal crossing and high occupancy vehicle (HOV) lane sensor data to the center for further analysis and storage.
- The field element shall return sensor and CCTV system operational status to the controlling center.
- The field element shall return sensor and CCTV system fault data to the controlling center for repair.
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Functional Area: Roadway Signal Controls |
- The field element shall control traffic signals under center control.
- The field element shall respond to pedestrian crossing requests by accommodating the pedestrian crossing.
- The field element shall provide the capability to notify the traffic management center of pedestrian calls and pedestrian accommodations.
- The field element shall report the current signal control information to the center.
- The field element shall report current preemption status to the center.
- The field element shall return traffic signal controller operational status to the center.
- The field element shall return traffic signal controller fault data to the center.
- The field element shall report current transit priority status to the center.
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Functional Area: Roadway Traffic Information Dissemination |
- The field element shall include dynamic messages signs for dissemination of traffic and other information to drivers, under center control; the DMS may be either those that display variable text messages, or those that have fixed format display(s) (e.g. vehicle restrictions, or lane open/close).
- The field element shall include driver information systems that communicate directly from a center to the vehicle radio (such as Highway Advisory Radios) for dissemination of traffic and other information to drivers, under center control.
- The field element shall include pedestrian information systems under center control (e.g. warning pedestrians of a potential hazard, or providing mandatory instructions as to the availability of pedestrian access).
- The field element shall provide operational status for the driver information systems equipment (DMS, HAR, etc.) to the center.
- The field element shall provide fault data for the driver information systems equipment (DMS, HAR, etc.) to the center for repair.
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Functional Area: Roadway Equipment Coordination |
- The field element shall include sensors that provide data and status information to other field element devices, without center control.
- The field element shall include sensors that receive configuration data from other field element devices, without center control.
- The field element shall include devices that provide data and status information to other field element devices without center control.
- The field element shall include devices that receive configuration data from other field element devices, without center control.
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Functional Area: Field Management Stations Operation |
- The field management station shall accept configuration information from the center.
- The filed management station shall pass data provided by the center to local field devices and report data from the field devices back to the center.
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