KIPDA Regional ITS Architecture

Element Expanded Functional Requirements: TRIMARC Lane Control Equipment

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 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 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.