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VDOT NWRO Field Equipment

Status:

Existing

Definition:

These devices are typically located along the roadside and are controlled by operators in the TOC which aids them in monitoring and managing traffic conditions. These devices include Weather Sensors, Traffic Detectors, CCTV, DMS, portable DMS, and in-pavement fog lights.

Stakeholder:

VDOT NWRO Region

Architecture Flow Diagrams
which include VDOT NWRO Field Equipment:

• VDOT NWRO Field Equipment VDOT NWRO TOC/ATMS

Architecture Flows
to/from the VDOT NWRO Field Equipment:

VDOT NWRO Field Equipment VDOT NWRO TOC/ATMS

• field equipment status


• rail crossing status


• roadway dynamic signage status


• signal control status


• signal fault data


• speed monitoring information


• traffic detector data


• traffic images


• traffic metering status

VDOT NWRO TOC/ATMSVDOT NWRO Field Equipment

• rail crossing control data


• rail crossing request


• roadway dynamic signage data


• signal control commands


• signal control device configuration


• signal control plans


• signal system configuration


• speed monitoring control


• traffic detector control


• traffic metering control


• video surveillance control

National ITS Architecture Subsystems
mapped to the VDOT NWRO Field Equipment:

• Connected Vehicle Roadside Equipment Subsystem
• ITS Roadway Equipment Subsystem

National ITS Architecture Services
associated with VDOT NWRO Field Equipment:

• TM01 - Infrastructure-Based Traffic Surveillance - VDOT NWRO TOC -- (Graphic)
• TM03 - Surface Street Control - VDOT NWRO TOC -- (Graphic)
• TM05 - Freeway Control - VDOT NWRO TOC -- (Graphic)
• TM17 - Speed Monitoring - VDOT NWRO -- (Graphic)

National ITS Architecture Functional Requirements
associated with VDOT NWRO Field Equipment:

Roadway Incident Detection

1. The field element shall collect, process, and send traffic images to the center for incident detection and further analysis.
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 Traffic Information Dissemination

1. The field element shall provide fault data for the driver information systems equipment (DMS, HAR, etc.) to the center for repair.
2. The field element shall provide operational status for the driver information systems equipment (DMS, HAR, etc.) to the center.
3. The field element shall include dynamic message signs for dissemination of traffic and other information to drivers, under center control; the DMS may be either those that display variable text messages, or those that have fixed format display(s) (e.g. vehicle restrictions, or lane open/close).

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

Roadway Environmental Monitoring

1. The field element shall include environmental sensors that measure weather conditions including temperature, wind, humidity, precipitation, and visibility.
2. The field element's environmental sensors shall be remotely controlled by a traffic management center.
3. The field element shall provide environmental sensor equipment operational status to the controlling center or maintenance vehicle.
4. The field element shall provide weather and road surface condition data to centers.

Roadway Work Zone Traffic Control

1. The field element shall control access to the work zone using automated gate or barrier systems. This includes automated flagger assistance devices that include automated gate arms and other automated gate/barrier systems.
2. The field element shall collect, process, and send work zone images to the center for further analysis and distribution, under center control.
3. The field element shall provide fault data for the surveillance (e.g. CCTV), driver information systems, and gates/barriers in work zones to the maintenance center for repair.
4. The field element shall provide operational status for the surveillance (e.g. CCTV), driver information systems, and gates/barriers in work zones to the maintenance center.
5. Under traffic and maintenance center control, the field element shall include driver information systems (such as dynamic messages signs and highway advisory radios) that advise drivers of activity around the work zone through which they are currently passing.