KIPDA Regional ITS Architecture

Element Expanded Functional Requirements: INDOT Traffic Signals

Functional Area: Advanced 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 determine whether the highway-rail intersection (HRI) is blocked by traffic in the roadway or some other obstruction.
  3. The field element shall notify the traffic management center and the rail wayside equipment of any intersection blockages, including trapped vehicles or other obstructions.
  4. 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.
  5. 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.
  6. The field element shall receive track status and arriving train information 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 when a train is expected and/or how long the crossing will be closed.
  7. The field element shall collect pedestrian images and pedestrian sensor data, and respond to pedestrian crossing requests via display, audio signal, or other manner.
  8. 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.
  9. The field element shall close the highway-rail intersection (HRI) when a train is approaching with enough time for traffic to safely clear the crossing using gates, lights/signs, barriers, and traffic control signals.
  10. 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.
  11. The field element shall forward rail traffic advisories received from the Wayside Equipment to the traffic management center.
  12. The field element shall provide approaching train advisories using field-vehicle communications to vehicles approaching the grade crossing.
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 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: 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 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: Roadway Signal Preemption
  1. The field element shall respond to signal preemption requests from emergency vehicles.
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.