---

VDOT Richmond 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. The field equipment that aids operators in performing their functions are: Dynamic Message Signs (DMS) permanent and portable, Highway Advisory Radio (HAR), Close Circuit Television (CCTV), vehicle detectors, Remote Ferry Signs, Vehicle Speed Sensors.

Stakeholder:

VDOT CRO Region

Architecture Flow Diagrams
which include VDOT Richmond TOC Field Equipment:

• VDOT Richmond TOC Field Equipment VDOT Richmond TOC

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

VDOT Richmond TOC Field Equipment VDOT Richmond TOC

• freeway control status


• roadway information system status


• signal control status


• speed monitoring information


• traffic flow


• traffic images

VDOT Richmond TOCVDOT Richmond TOC Field Equipment

• 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 Richmond TOC Field Equipment:

• Roadway Subsystem

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

• APTS09 - Transit Signal Priority - PAT -- (Graphic)
• APTS09 - Transit Signal Priority - GRTC -- (Graphic)
• ATMS01 - Network Surveillance - VDOT Richmond TOC -- (Graphic)
• ATMS04 - Freeway Control - VDOT Richmond TOC -- (Graphic)
• ATMS19 - Speed Monitoring - VDOT Richmond TOC -- (Graphic)

National ITS Architecture Functional Requirements
associated with VDOT Richmond 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 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.

Roadway Equipment Coordination

1. The field element shall include sensors (such as traffic, environmental, and work zone intrusion detection sensors) that provide data and status information to other field element devices (such as dynamic message signs, ramp meters, traffic signals, work zone intrusion alert systems), without center control.
2. The field element shall include sensors (such as traffic, environmental, and work zone intrusion detection sensors) that receive control information from other field element devices, without center control.
3. The field element shall include devices (such as arterial or freeway controllers, roadway automated treatment systems, barrier and safeguard systems, emissions or pollution systems, and work zone intrusion alert systems) that provide data and status information to other field element devices (such as dynamic message signs, traffic controllers on adjacent intersections), without center control.
4. The field element shall include devices (such as arterial or freeway controllers, roadway automated treatment systems, barrier and safeguard systems, emissions or pollution systems, and work zone intrusion alert systems) that receive control information from other field element devices, without center control.

Field Barrier System Control

1. The field element shall activate barrier systems for transportation facilities and infrastructure under center control. Barrier systems include automated or remotely controlled gates, barriers and other systems that manage entry to roadways.
2. The field element shall return barrier system operational status to the controlling center.
3. The field element shall return barrier system fault data to the maintenance center for repair.

Roadway Speed Monitoring

1. The field element shall include sensors to detect vehicle speeds, under traffic or maintenance center control.
2. The field element shall return operational status for the vehicle speed sensors to the controlling traffic or maintenance center; including measured speeds, warning messages displayed, and violation records.
3. The field element shall return fault data for the vehicle speed sensors to the controlling center for repair.

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. Under the control of field personnel within maintenance vehicles, the field element shall include driver information systems (such as dynamic messages signs and highway advisory radios) that advise drivers of activity around a work zone through which they are currently passing.
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.

Roadway Work Zone Safety

1. The field element shall include work zone intrusion detection devices that detect when a vehicle has intruded upon the boundary of a work zone, under center control.
2. The field element shall include work zone intrusion alerting devices that notify crew via maintenance vehicles of a work zone emergency or safety issue such as the intrusion of a vehicle into the work zone area or movement of field crew into the travel lanes.
3. The field element shall provide operational status for the work zone intrusion detection devices to the maintenance center.
4. The field element shall provide fault data for the work zone intrusion detection devices to the maintenance center for repair.
5. The field element shall provide operational status for the work zone intrusion alerting devices to the maintenance center.
6. The field element shall provide fault data for the work zone intrusion alerting devices to the maintenance center for repair.

Roadway Short Range Traveler Information Communications

1. The field element shall distribute advisory information, such as evacuation information, wide-area alerts, incident information, work zone intrusion information, and other special information to passing vehicles using short range communications, under center control.
2. The field element shall return system fault data to the maintenance center for repair.

Roadway Data Collection

1. The field element shall collect traffic, road, and environmental conditions information.
2. The field element shall include the sensors and supporting roadside devices that sense, collect, and send traffic, road, and environmental conditions information to a center for archival.
3. The field element shall collect sensor status and sensor faults from roadside equipment and send it along with the recorded data to a center for archival.