New York City Sub-regional ITS Architecture

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.

Functional Area: Roadway Traffic Metering

The field element shall regulate the flow of traffic on ramps, interchanges, and the mainline, under center control.
The field element shall monitor operation of ramp, interchange, and mainline meters and report to the center any conflicts between received control plans and current system operation.
The field element shall return ramp, interchange, and mainline meter operational status to the controlling center.
The field element shall provide indications to the driver that the metering system is active and provide safe transitions between active and inactive status.
The field element shall return ramp, interchange, and mainline meter fault data to the maintenance center for repair.

Functional Area: Roadway Reversible Lanes

The field element shall monitor traffic in reversible lanes, including wrong-way vehicles, using sensors and surveillance equipment under center control.
The field element shall include automated reversible lane equipment and driver information systems (such as lane control signals) that control traffic in reversible lanes on surface streets, under center control.
The field element shall include automated reversible lane equipment and driver information systems (such as lane control signals) that control traffic in reversible lanes on freeways, under center control.
The field element shall provide operational status for the reversible lane field equipment to the center.
The field element shall provide fault data for the reversible lane field equipment to the center.

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.

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.