District of Columbia ITS Architecture

Interfaces:

Roadway Reversible Lanes

• 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.
• 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.
• The field element shall provide operational status for the reversible lane field equipment to the center.
• The field element shall provide fault data for the reversible lane field equipment to the center.

Roadway Traffic Information Dissemination

• 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.
• The field element shall provide operational status for the driver information systems equipment (DMS, HAR, etc.) to the center.
• The field element shall provide fault data for the driver information systems equipment (DMS, HAR, etc.) to the center for repair.

Roadway Equipment Coordination

• The field element shall include sensors (such as traffic, environmental, and work zone intrusion detection sensors) that provide data and status information to other field element devices (such as dynamic message signs, ramp meters, traffic signals, work zone intrusion alert systems), without center control.
• The field element shall include devices (such as arterial or freeway controllers, roadway automated treatment systems, barrier and safeguard systems, emissions or pollution systems, and work zone intrusion alert systems) that provide data and status information to other field element devices (such as dynamic message signs, traffic controllers on adjacent intersections), without center control.
• The field element shall include devices (such as arterial or freeway controllers, roadway automated treatment systems, barrier and safeguard systems, emissions or pollution systems, and work zone intrusion alert systems) that receive control information from other field element devices, without center control.