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NWR Local Field Equipment

Status:

Existing

Definition:

These devices are typically located along the roadside and are controlled by operators in local signal centers which aids them in monitoring and managing conditions. Examples include traffic controllers for the traffic signal system, CCTV, and vehicle detection. These devices are owned by the local signal centers separate from devices in this region that owned by VDOT.

Stakeholder:

NWR Local Public Works Agencies

Architecture Flow Diagrams
which include NWR Local Field Equipment:

• NWR Local Field Equipment NWR Local Signal Centers

Architecture Flows
to/from the NWR Local Field Equipment:

NWR Local Field Equipment NWR Local Signal Centers

• request for right-of-way


• roadway information system status


• signal control status


• traffic images

NWR Local Signal CentersNWR Local Field Equipment

• roadway information system data


• signal control data


• traffic sensor control

National ITS Architecture Subsystems
mapped to the NWR Local Field Equipment:

• Roadway Subsystem

National ITS Architecture Services
associated with NWR Local Field Equipment:

• ATMS01 - Network Surveillance - NWR Local Signal Centers -- (Graphic)
• ATMS03 - Surface Street Control - NWR Local Signal Centers -- (Graphic)

National ITS Architecture Functional Requirements
associated with NWR Local 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.

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.