New York City Sub-regional ITS Architecture

Functional Area: TMC Traffic Metering

The center shall remotely control systems to manage use of the freeways, including ramp, interchange, and mainline metering.
The center shall collect operational status from ramp meters, interchange meters, and mainline meters and compare against the control information sent by the center.
The center shall collect fault data from ramp meters, interchange meters, and mainline meters.
The center shall implement control strategies, under control of center personnel, on some or all of the freeway network devices (e.g. ramp meters, interchange meters, and mainline meters), based on data from sensors monitoring traffic conditions upstream, downstream, and queue data on the approaches to the meters.

Functional Area: TMC Regional Traffic Management

The center shall exchange traffic information with other traffic management centers including incident information, congestion data, traffic data, signal timing plans, and real-time signal control information.
The center shall exchange traffic control information with other traffic management centers to support remote monitoring and control of traffic management devices (e.g. signs, sensors, signals, cameras, etc.).

Functional Area: TMC Signal Control

The center shall remotely control traffic signal controllers.
The center shall accept notifications of pedestrian calls.
The center shall collect traffic signal controller operational status and compare against the control information sent by the center.
The center shall collect traffic signal controller fault data from the field.
The center shall manage (define, store and modify) control plans to coordinate signalized intersections, to be engaged at the direction of center personnel or according to a daily schedule.
The center shall implement control plans to coordinate signalized intersections based on data from sensors.
The center shall manage boundaries of the control sections used within the signal system.
The center shall maintain traffic signal coordination including synchronizing clocks throughout the system.

Functional Area: TMC Traffic Information Dissemination

The center shall remotely control dynamic messages signs for dissemination of traffic and other information to drivers.
The center shall remotely control 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.
The center shall collect operational status for the driver information systems equipment (DMS, HAR, etc.).
The center shall collect fault data for the driver information systems equipment (DMS, HAR, etc.) for repair.
The center shall retrieve locally stored traffic information, including current and forecasted traffic information, road and weather conditions, traffic incident information, information on diversions and alternate routes, closures, and special traffic restrictions (lane/shoulder use, weight restrictions, width restrictions, HOV requirements), and the definition of the road network itself.
The center shall distribute traffic data to maintenance and construction centers, transit centers, emergency management centers, and traveler information providers.
The center shall distribute traffic data to the media; the capability to provide the information in both data stream and graphical display shall be supported.
The center shall provide the capability for center personnel to control the nature of the data that is available to non-traffic operations centers and the media.

Functional Area: Traffic Equipment Maintenance

The center shall collect and store sensor (traffic, pedestrian, multimodal crossing) operational status.
The center shall collect and store CCTV surveillance system (traffic, pedestrian) operational status.
The center shall collect and store sensor (traffic, pedestrian, multimodal crossing) fault data and send to the maintenance center for repair.
The center shall collect and store CCTV surveillance system (traffic, pedestrian) fault data send to the maintenance center for repair.
The center shall collect environmental sensor operational status.
The center shall collect environmental sensor equipment fault data and send to the maintenance center for repair.
The center shall exchange data with maintenance centers concerning the reporting of faulty equipment and the schedule/status of their repair. Information exchanged includes details of new equipment faults, and clearances when the faults are cleared.
The center shall support an interface with a map update provider, or other appropriate data sources, through which updates of digitized map data can be obtained and used as a background for traffic maintenance data.

Functional Area: Traffic Data Collection

The center shall collect traffic management data such as operational data, event logs, etc.
The center shall assign quality control metrics and meta-data to be stored along with the data. Meta-data may include attributes that describe the source and quality of the data and the conditions surrounding the collection of the data.
The center shall receive and respond to requests from ITS Archives for either a catalog of the traffic data or for the data itself.
The center shall be able to produce sample products of the data available.