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VDOT Hampton Roads 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 ERO Region

Architecture Flow Diagrams
which include VDOT Hampton Roads TOC Field Equipment:

• VDOT Hampton Roads TOC Field Equipment VDOT ADMS
• VDOT Hampton Roads TOC Field Equipment VDOT Hampton Roads TOC
• VDOT Hampton Roads TOC Field Equipment VDOT Joint Berkley Bridge- Downtown Elizabeth River Tunnel TOC

Architecture Flows
to/from the VDOT Hampton Roads TOC Field Equipment:

VDOT Hampton Roads TOC Field Equipment VDOT Hampton Roads TOC

• barrier system status


• field device status


• freeway control status


• hov data


• reversible lane status


• roadway information system status


• signal control status


• traffic flow


• traffic images

VDOT Hampton Roads TOC Field Equipment VDOT Joint Berkley Bridge- Downtown Elizabeth River Tunnel TOC

• traffic images

VDOT ADMSVDOT Hampton Roads TOC Field Equipment

• data collection and monitoring control

VDOT Hampton Roads TOCVDOT Hampton Roads TOC Field Equipment

• barrier system control


• environmental sensors control


• freeway control data


• reversible lane control


• roadway information system data


• signal control data


• traffic sensor control


• video surveillance control

VDOT Joint Berkley Bridge- Downtown Elizabeth River Tunnel TOCVDOT Hampton Roads TOC Field Equipment

• video surveillance control

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

• Roadway Subsystem

National ITS Architecture Services
associated with VDOT Hampton Roads TOC Field Equipment:

• ATMS01 - Network Surveillance - VDOT Hampton Roads TOC -- (Graphic)
• ATMS03 - Surface Street Control - VDOT Hampton Roads TOC -- (Graphic)
• ATMS04 - Freeway Control - VDOT Hampton Roads TOC -- (Graphic)
• ATMS06 - Traffic Information Dissemination - VDOT Hampton Roads TOC -- (Graphic)
• ATMS20 - Drawbridge Management - VDOT ERO Region -- (Graphic)
• ATMS21 - Roadway Closure Management - Virginia ER Region -- (Graphic)
• MC07 - Roadway Maintenance and Construction - Virginia ER Region -- (Graphic)

National ITS Architecture Functional Requirements
associated with VDOT Hampton Roads 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 collect, digitize, and send multimodal crossing and high occupancy vehicle (HOV) lane sensor data to the center for further analysis and storage.
4. The field element shall return sensor and CCTV system operational status to the controlling center.
5. The field element shall return sensor and CCTV system fault data to the controlling center for repair.

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 monitor operation of traffic signal controllers and report to the center any instances in which the indicator response does not match that expected from the indicator control information.
3. The field element shall monitor operation of traffic signal controllers and report to the center any instances in which the indicator response does not match that expected from known indicator preemptions.
4. The field element shall return traffic signal controller operational status to the controlling center.
5. The field element shall return traffic signal controller fault data to the maintenance 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 monitor operation of ramp meter, mainline meters, and lane control indicators and report to the center any instances in which the indicator response does not match that expected from the indicator control information.
3. The field element shall monitor operation of ramp meter, mainline meters, and lane control indicators and report to the center any instances in which the indicator response does not match that expected from known indicator preemptions.
4. The field element shall return ramp metering controller, mainline meters, and lane control operational status to the controlling center.
5. The field element shall return ramp metering controller, mainline meters, and lane control fault data to the maintenance center for repair.
6. The field element shall provide indications to the driver that a freeway ramp or a lane is available for use, with possible usage data for the freeway lanes they are entering.

Roadway HOV Control

1. The field element shall include sensors to detect high-occupancy vehicle (HOV) lane usage, under center control.
2. The field element shall include driver information systems to notify users of lane status for lanes that become HOV or High Occupancy Toll (HOT) lanes during certain times of the day on freeways, under center control.
3. The field element shall include freeway control devices, such as ramp signals and mainline metering and other systems associated with freeway operations that control use of HOV lanes, under center control.
4. The field element shall provide traffic flow measures and information regarding vehicle occupancy (i.e., lane usage) in HOV lanes to the center.
5. The field element shall return operational status for the HOV lane sensors to the controlling center.
6. The field element shall return fault data for the HOV lane sensors to the 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 include driver information systems that communicate directly from a center to the vehicle radio (such as Highway Advisory Radios) for dissemination of traffic and other information to drivers, under center control.
3. The field element shall provide operational status for the driver information systems equipment (DMS, HAR, etc.) to the center.
4. 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 shall remotely process video data and provide an indication of potential incidents to the traffic management center.
3. The field element's video devices shall be remotely controlled by a traffic management center.
4. The field element shall provide operational status and fault data for the incident detection devices to the traffic management center.

Roadway Field Device Monitoring

1. The field element shall monitor the operational status (state of the device, configuration, and fault data) of connected sensors (such as traffic, infrastructure, environmental, security, speed) and devices (such as highway advisory radio, dynamic message signs, automated roadway treatment systems, barrier and safeguard systems, cameras, traffic signals, ramp meters, short range communications equipment, security surveillance equipment).
2. The field element shall send operational status of connected field equipment to the maintenance center.
3. The field element shall send collected fault data to the maintenance center for repair.
4. The field element shall include a local interface that provides operational status and fault data for connected field equipment to field personnel.
5. The field element shall include a local interface that allows field personnel to command diagnostic tests on connected field equipment.

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 Reversible Lanes

1. The field element shall monitor traffic in reversible lanes, including wrong-way vehicles, using sensors and surveillance equipment under center control.
2. The field element shall include automated reversible lane equipment and driver information systems (such as lane control signals) that control traffic in reversible lanes on freeways, under center control.
3. The field element shall provide operational status for the reversible lane field equipment to the center.
4. The field element shall provide fault data for the reversible lane field equipment to the center.