District of Columbia ITS Architecture

Interfaces:

Roadway Basic Surveillance

• 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.
• The field element shall collect, process, and send traffic images to the center for further analysis and distribution.
• The field element shall return sensor and CCTV system operational status to the controlling center.
• The field element shall return sensor and CCTV system fault data to the controlling center for repair.

Roadway Incident Detection

• The field element shall collect, process, and send traffic images to the center for further analysis and distribution.
• The field element shall remotely process video data and provide an indication of potential incidents to the traffic management center.
• The field element's video devices shall be remotely controlled by a traffic management center.
• The field element shall provide operational status and fault data for the incident detection devices to the traffic management center.

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.

Roadway Field Device Monitoring

• 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).
• The field element shall send operational status of connected field equipment to the maintenance center.
• The field element shall send collected fault data to the maintenance center for repair.
• The field element shall include a local interface that provides operational status and fault data for connected field equipment to field personnel.
• The field element shall include a local interface that allows field personnel to command diagnostic tests on connected field equipment.