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SWR 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:

SWR Local Public Works Agencies

Architecture Flow Diagrams
which include SWR Local Field Equipment:

• SWR Local Field Equipment SWR Local Signal Centers

Architecture Flows
to/from the SWR Local Field Equipment:

SWR Local Field Equipment SWR Local Signal Centers

• request for right-of-way


• roadway information system status


• signal control status


• traffic images

SWR Local Signal CentersSWR Local Field Equipment

• roadway information system data


• signal control data


• traffic sensor control

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

• Roadway Subsystem

National ITS Architecture Services
associated with SWR Local Field Equipment:

• ATMS01 - Network Surveillance - SWR Local Signal Centers -- (Graphic)
• ATMS03 - Surface Street Control - SWR Local Signal Centers -- (Graphic)
• MC08 - Work Zone Management - SWR -- (Graphic)

National ITS Architecture Functional Requirements
associated with SWR Local Field Equipment:

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.

Roadway Signal Priority

1. The field element shall respond to requests for indicator (e.g., signal) preemption requests from emergency vehicles at intersections, pedestrian crossings, and multimodal crossings.