KIPDA Regional ITS Architecture

Element Expanded Functional Requirements: Louisville Metro Traffic Signals

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: Roadway Safety Warning System
  1. The field element shall collect safety data from passing vehicles including location, vehicle motion (speed, heading, acceleration), vehicle control (brakes, steering, throttle, exterior lights), and additional vehicle status (anti-lock brake activation, stability control activation).
  2. The field element shall collect data from sensors and surveillance equipment to monitor environmental conditions, stopped or wrong way vehicles, roadway debris, or other potentially hazardous conditions.
  3. The field element shall process the collected data to identify potential hazards.
  4. The field element shall provide warnings to passing vehicles using field-vehicle communications.
  5. The field element shall support remote monitoring and control by an authenticated center.
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.