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VDOT Fredericksburg District Traffic Signal Center Field Equipment

Status:

Existing

Definition:

These devices are typically located along the roadside and are controlled by operators in the Fredericksburg District which aids them in monitoring and managing conditions. Examples include traffic controllers for the traffic signal system, vehicle detection, and video image detection systems (VID). Approximately 25% of the District's signals are equipped with VIDs and the remainder uses loops. CCTV coverage along primary routes are planned.

Stakeholder:

VDOT Fredericksburg District Office

Architecture Flow Diagrams
which include VDOT Fredericksburg District Traffic Signal Center Field Equipment:

• VDOT Fredericksburg District Traffic Signal Center Field Equipment FRED Transit Vehicles
• VDOT Fredericksburg District Traffic Signal Center Field Equipment VDOT Fredericksburg District Traffic Signal Center

Architecture Flows
to/from the VDOT Fredericksburg District Traffic Signal Center Field Equipment:

VDOT Fredericksburg District Traffic Signal Center Field Equipment VDOT Fredericksburg District Traffic Signal Center

• roadway information system status


• signal control status


• traffic flow


• traffic images

FRED Transit VehiclesVDOT Fredericksburg District Traffic Signal Center Field Equipment

• local signal priority request

VDOT Fredericksburg District Traffic Signal CenterVDOT Fredericksburg District Traffic Signal Center Field Equipment

• roadway information system data


• signal control data


• traffic sensor control


• video surveillance control

National ITS Architecture Subsystems
mapped to the VDOT Fredericksburg District Traffic Signal Center Field Equipment:

• Roadway Subsystem

National ITS Architecture Services
associated with VDOT Fredericksburg District Traffic Signal Center Field Equipment:

• ATMS01 - Network Surveillance - VDOT Fredericksburg District Signal Center -- (Graphic)
• ATMS03 - Surface Street Control - VDOT Fredericksburg District Signal Center -- (Graphic)
• MC08 - Work Zone Management - Fredericksburg District -- (Graphic)

National ITS Architecture Functional Requirements
associated with VDOT Fredericksburg District Traffic Signal Center 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.

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 return traffic signal controller operational status to the controlling center.
3. The field element shall return traffic signal controller fault data to the maintenance center for repair.