New York Sub-Regional ITS Architecture

Element Expanded Functional Requirements: NYC DOT Field Equipment

Functional Area: Roadway Signal Priority
  1. The field element shall respond to signal priority requests from transit vehicles.
Functional Area: Roadway Basic Surveillance
  1. 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.
  2. The field element shall collect, process, and send traffic images to the center for further analysis and distribution.
  3. 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.
  4. The field element shall return sensor and CCTV system operational status to the controlling center.
  5. The field element shall return sensor and CCTV system fault data to the controlling center for repair.
Functional Area: Roadway Environmental Monitoring
  1. The field element shall include surface and sub-surface environmental sensors that measure road surface temperature, moisture, icing, salinity, and other measures.
  2. The field element shall include environmental sensors that measure weather conditions including temperature, wind, humidity, precipitation, and visibility.
  3. The field element's environmental sensors shall be remotely controlled by a maintenance center.
  4. The field element's environmental sensors shall be remotely controlled by a traffic management center.
  5. The field element's environmental sensors shall be remotely controlled by weather service providers such as the National Weather Service or value-added sector specific meteorological services.
  6. The field element's environmental sensors shall be remotely controlled by a maintenance and construction vehicle.
  7. The field element shall provide environmental sensor equipment operational status to the controlling center or maintenance vehicle.
  8. The field element shall provide environmental sensor equipment fault indication to the controlling center or maintenance vehicle.
  9. The field element shall remotely aggregate environmental sensor data with environmental data collected from maintenance and construction vehicles.
  10. The field element shall provide weather and road surface condition data to centers.
  11. The field element shall provide weather and road surface condition data to maintenance and construction vehicles.
Functional Area: Roadway Traffic Metering
  1. The field element shall regulate the flow of traffic on ramps, interchanges, and the mainline, under center control.
  2. 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.
  3. The field element shall return ramp, interchange, and mainline meter operational status to the controlling center.
  4. The field element shall provide indications to the driver that the metering system is active and provide safe transitions between active and inactive status.
  5. The field element shall return ramp, interchange, and mainline meter fault data to the maintenance center for repair.
Functional Area: Roadway HOV Control
  1. The field element shall include sensors to detect high-occupancy vehicle (HOV) lane usage, under center control.
  2. The field element shall include driver information systems to notify users of lane status for lanes that become HOV or High Occupancy Toll (HOT) lanes during certain times of the day on freeways, under center control.
  3. The field element shall include freeway control devices, such as ramp signals and mainline metering and other systems associated with freeway operations that control use of HOV lanes, under center control.
  4. The field element shall collect a count of vehicle occupants from passing vehicles using field-vehicle communications.
  5. The field element shall provide traffic flow measures and information regarding vehicle occupancy (i.e., lane usage) in HOV lanes to the center.
  6. The field element shall return operational status for the HOV lane sensors to the controlling center.
  7. The field element shall return fault data for the HOV lane sensors to the center for repair.
Functional Area: Roadway Probe Data Communications
  1. The field element shall communicate with passing vehicles for traffic data link time calculations and send collected data to the controlling center; identification will be removed to ensure anonymity.
  2. The field element shall communicate with on-board equipment on passing vehicles to collect current vehicle position, speed, and heading and a record of previous events (e.g., starts and stops, link travel times) that can be used to determine current traffic conditions.
  3. The field element shall communicate with on-board equipment on passing vehicles to collect current status information and a record of previous events (e.g., temperature, wiper status, headlight status, traction control system status) that can be used to determine road and surface weather conditions.
  4. The field element shall communicate with on-board equipment on passing vehicles to collect vehicle trip information (e.g., origin and destination information, travel times) that can be used to support transportation planning.
  5. The field element shall communicate with on-board equipment on passing vehicles to collect a history of precise positioning information that can be used to derive or verify accurate roadway geometry and lane features for use by map update providers.
  6. The field element shall aggregate and forward collected probe information to the center.
  7. The field element shall provide roadside equipment operational status to the center.
  8. The field element shall provide roadside equipment fault indication to the center for repair.
Functional Area: Roadway Reversible Lanes
  1. The field element shall monitor traffic in reversible lanes, including wrong-way vehicles, using sensors and surveillance equipment under center control.
  2. 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.
  3. 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.
  4. The field element shall provide operational status for the reversible lane field equipment to the center.
  5. The field element shall provide fault data for the reversible lane field equipment to the center.
Functional Area: Roadway Signal Controls
  1. The field element shall control traffic signals under center control.
  2. The field element shall respond to pedestrian crossing requests by accommodating the pedestrian crossing.
  3. The field element shall provide the capability to notify the traffic management center of pedestrian calls and pedestrian accommodations.
  4. The field element shall report the current signal control information to the center.
  5. The field element shall report current preemption status to the center.
  6. The field element shall return traffic signal controller operational status to the center.
  7. The field element shall return traffic signal controller fault data to the center.
  8. The field element shall report current transit priority status to the center.
Functional Area: Roadway Traffic Information Dissemination
  1. 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).
  2. 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.
  3. 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).
  4. The field element shall provide operational status for the driver information systems equipment (DMS, HAR, etc.) to the center.
  5. The field element shall provide fault data for the driver information systems equipment (DMS, HAR, etc.) to the center for repair.
Functional Area: Standard Rail Crossing
  1. The field element shall collect and process, traffic sensor data in the vicinity of a highway-rail intersection (HRI).
  2. The field element shall monitor the status of the highway-rail intersection (HRI) equipment, including both the current state and mode of operation and the current equipment condition, to be forwarded on to the traffic management center.
  3. The field element shall monitor the status of the highway-rail intersection (HRI) equipment, including both the current state and mode of operation and the current equipment condition, to be forwarded on to the rail wayside equipment.
  4. The field element shall receive track status from the rail wayside equipment that can be passed on to the traffic management center. This may include the current status of the tracks and whether a train is approaching.
  5. The field element shall collect pedestrian images and pedestrian sensor data, and respond to pedestrian crossing requests via display, audio signal, or other manner.
  6. The field element shall control the dynamic message signs (DMS) in the vicinity of a highway-rail intersection (HRI) to advise drivers, cyclists, and pedestrians of approaching trains.
  7. The field element shall close the highway-rail intersection (HRI) when a train is approaching using gates, lights/signs, barriers, and traffic control signals.
  8. The field element shall support the integrated control of adjacent traffic signals to clear an area in advance of an approaching train and to manage traffic around the intersection.
  9. The field element shall forward rail traffic advisories received from the Wayside Equipment to the traffic management center.
Functional Area: Roadway Equipment Coordination
  1. The field element shall include sensors that provide data and status information to other field element devices, without center control.
  2. The field element shall include sensors that receive configuration data from other field element devices, without center control.
  3. The field element shall include devices that provide data and status information to other field element devices without center control.
  4. The field element shall include devices that receive configuration data from other field element devices, without center control.
Functional Area: Roadway Automated Treatment
  1. The field element shall activate automated roadway treatment systems based on environmental or atmospheric conditions. Treatments can be in the form of fog dispersion, anti-icing chemicals, etc.
  2. The field element shall activate automated roadway treatment systems under center control. Treatments can be in the form of fog dispersion, anti-icing chemicals, etc.
  3. The field element shall return automated roadway treatment system and associated environmental sensor operational status to the maintenance center.
  4. The field element shall return automated roadway treatment system and associated environmental sensor fault data to the maintenance center for repair.
Functional Area: Roadway Work Zone Safety
  1. The field element shall include work zone intrusion detection devices that detect when a vehicle has intruded upon the boundary of a work zone, under center control.
  2. The field element shall include work zone intrusion detection devices that detect when crew workers have crossed the boundary between the work zone and vehicle traffic, under center control.
  3. The field element shall include work zone intrusion alerting devices that alert crew workers of a work zone emergency or safety issue such as the intrusion of a vehicle into the work zone area or movement of field crew into the travel lanes.
  4. The field element shall include work zone intrusion alerting devices that notify crew via maintenance vehicles of a work zone emergency or safety issue such as the intrusion of a vehicle into the work zone area or movement of field crew into the travel lanes.
  5. The field element shall include work zone intrusion alerting devices that alert drivers that they have intruded upon the perimeter of the work zone, or are about to do so; may provide alerts to drivers directly or via in-vehicle signing.
  6. The field element shall provide operational status for the work zone intrusion detection devices to the maintenance center.
  7. The field element shall provide fault data for the work zone intrusion detection devices to the maintenance center for repair.
  8. The field element shall provide operational status for the work zone intrusion alerting devices to the maintenance center.
  9. The field element shall provide fault data for the work zone intrusion alerting devices to the maintenance center for repair.
Functional Area: Roadway Work Zone Traffic Control
  1. The field element shall collect, process, and send work zone images to the center for further analysis and distribution, under center control.
  2. Under traffic and maintenance center control, the field element shall include driver information systems (such as dynamic messages signs and highway advisory radios) that advise drivers of activity around the work zone through which they are currently passing.
  3. Under the control of field personnel within maintenance vehicles, the field element shall include driver information systems (such as dynamic messages signs and highway advisory radios) that advise drivers of activity around a work zone through which they are currently passing.
  4. The field element shall control access to the work zone using automated gate or barrier systems. This includes automated flagger assistance devices that include automated gate arms and other automated gate/barrier systems.
  5. The field element shall provide operational status for the surveillance (e.g. CCTV), driver information systems, and gates/barriers in work zones to the maintenance center.
  6. The field element shall provide fault data for the surveillance (e.g. CCTV), driver information systems, and gates/barriers in work zones to the maintenance center for repair.
Functional Area: Field Barrier System Control
  1. The field element shall activate barrier systems for transportation facilities and infrastructure under center control. Barrier systems include automated or remotely controlled gates, barriers and other systems that manage entry to roadways.
  2. The field element shall return barrier system operational status to the controlling center.
  3. The field element shall return barrier system fault data to the maintenance center for repair.
  4. The field element shall receive requests for access from approaching vehicles using field-vehicle communications and validate and authenticate the requests.
  5. The field element shall grant access only to qualified vehicles.
  6. The field element shall communicate access permission status and access instructions to approaching vehicles using field-vehicle communications.
Functional Area: Roadway Field Device Monitoring
  1. The field element shall monitor the operational status (state of the device, configuration, and fault data) of connected sensors (such as traffic, infrastructure, environmental, security, speed) and devices (such as highway advisory radio, dynamic message signs, automated roadway treatment systems, barrier and safeguard systems, cameras, traffic signals, ramp meters, short range communications equipment, security surveillance equipment).
  2. The field element shall send operational status of connected field equipment to the maintenance center.
  3. The field element shall send collected fault data to the maintenance center for repair.
  4. The field element shall include a local interface that provides operational status and fault data for connected field equipment to field personnel.
  5. The field element shall include a local interface that allows field personnel to command diagnostic tests on connected field equipment.
Functional Area: Field Management Stations Operation
  1. The field management station shall accept configuration information from the center.
  2. 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.