AMPA Regional ITS Architecture Update

Element Expanded Functional Requirements: NMDOT Ramp Metering Devices

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 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.