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VDOT Salem TOC 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 HAR, Lane Control, Gates, Weather Sensors, Traffic Detectors, CCTV, VMS and Ramp Metering.

Stakeholder:

VDOT SWRO Region

Architecture Flow Diagrams
which include VDOT Salem TOC Field Equipment:

• VDOT Salem TOC Field Equipment Rail Wayside Equipment
• VDOT Salem TOC Field Equipment VDOT Salem TOC

Architecture Flows
to/from the VDOT Salem TOC Field Equipment:

VDOT Salem TOC Field Equipment Rail Wayside Equipment

• intersection blockage notification

VDOT Salem TOC Field Equipment VDOT Salem TOC

• environmental sensor data


• freeway control status


• roadway information system status


• speed monitoring information


• traffic flow


• traffic images

Rail Wayside EquipmentVDOT Salem TOC Field Equipment

• arriving train information


• track status

VDOT Salem TOCVDOT Salem TOC Field Equipment

• environmental sensors control


• freeway control data


• roadway information system data


• signal control data


• speed monitoring control


• traffic sensor control


• video surveillance control

National ITS Architecture Subsystems
mapped to the VDOT Salem TOC Field Equipment:

• Roadway Subsystem

National ITS Architecture Services
associated with VDOT Salem TOC Field Equipment:

• ATMS01 - Network Surveillance - VDOT SWRTOC -- (Graphic)
• ATMS04 - Freeway Control - VDOT SWRTOC -- (Graphic)

National ITS Architecture Functional Requirements
associated with VDOT Salem TOC 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 Freeway Control

1. The field element shall include ramp metering controllers, mainline meters, and lane controls for use on freeways, under center control.
2. The field element shall return ramp metering controller, mainline meters, and lane control operational status to the controlling center.

Roadway Traffic Information Dissemination

1. The field element shall include dynamic messages 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).
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 provide fault data for the driver information systems equipment (DMS, HAR, etc.) to the 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 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 collect, process, and send work zone images to the center for further analysis and distribution, under center control.
2. 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.
3. 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.
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. 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.