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City of Charlottesville TMC Field Equipment

Status:

Existing

Definition:

These devices are typically located along the roadside and are controlled by operators in the TMC which aids them in monitoring and managing traffic conditions. The field equipment that aids operators in performing their functions are: Traffic Signal Systems and CCTV Cameras.

Stakeholder:

City of Charlottesville Public Works Department

Architecture Flow Diagrams
which include City of Charlottesville TMC Field Equipment:

• City of Charlottesville TMC Field Equipment City of Charlottesville TMC

Architecture Flows
to/from the City of Charlottesville TMC Field Equipment:

City of Charlottesville TMC Field Equipment City of Charlottesville TMC

• request for right-of-way


• signal control status


• traffic flow


• traffic images

City of Charlottesville TMCCity of Charlottesville TMC Field Equipment

• signal control data


• traffic sensor control


• video surveillance control

National ITS Architecture Subsystems
mapped to the City of Charlottesville TMC Field Equipment:

• Roadway Subsystem

National ITS Architecture Services
associated with City of Charlottesville TMC Field Equipment:

• ATMS01 - Network Surveillance - City of Charlottesville -- (Graphic)
• ATMS03 - Surface Street Control - City of Charlottesville -- (Graphic)

National ITS Architecture Functional Requirements
associated with City of Charlottesville TMC Field Equipment:

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 return sensor and CCTV system operational status to the controlling center.
4. The field element shall return sensor and CCTV system fault data to the controlling center for repair.

Roadway Signal Controls

1. The field element shall control traffic signals at intersections and on main highways for urban and rural areas, under center control.
2. The field element shall collect pedestrian images and pedestrian sensor data, and respond to pedestrian crossing requests via display, audio signal, or other manner.
3. The field element shall provide the capability to notify the traffic management center that a pedestrian has requested right-of-way and when the request was or will be granted (request for right-of-way).
4. The field element shall monitor operation of traffic signal controllers and report to the center any instances in which the indicator response does not match that expected from the indicator control information.
5. The field element shall monitor operation of traffic signal controllers and report to the center any instances in which the indicator response does not match that expected from known indicator preemptions.
6. The field element shall return traffic signal controller operational status to the controlling center.
7. The field element shall return traffic signal controller fault data to the maintenance center for repair.

Roadway Incident Detection

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

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.

Roadway Data Collection

1. The field element shall collect traffic, road, and environmental conditions information.
2. The field element shall collect sensor status and sensor faults from roadside equipment and send it along with the recorded data to a center for archival.