---

VDOT ERO 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 ERO Field Equipment:

• VDOT ERO Field Equipment VDOT ADMS
• VDOT ERO Field Equipment VDOT ERO TOC/ATMS
• VDOT ERO Field Equipment VDOT Joint Berkley Bridge- Downtown Elizabeth River Tunnel TOC

Architecture Flows
to/from the VDOT ERO Field Equipment:

VDOT ERO Field Equipment VDOT ERO TOC/ATMS

• barrier system status


• field equipment status


• lane management information


• reversible lane status


• roadway dynamic signage status


• signal control status


• signal fault data


• traffic detector data


• traffic images


• traffic metering status

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

• traffic images

VDOT ADMSVDOT ERO Field Equipment

• data collection and monitoring control

VDOT ERO TOC/ATMSVDOT ERO Field Equipment

• barrier system control


• environmental sensors control


• reversible lane control


• roadway dynamic signage data


• signal control commands


• signal control device configuration


• signal control plans


• signal system configuration


• traffic detector control


• traffic metering control


• video surveillance control

VDOT Joint Berkley Bridge- Downtown Elizabeth River Tunnel TOCVDOT ERO Field Equipment

• video surveillance control

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

• Connected Vehicle Roadside Equipment Subsystem
• ITS Roadway Equipment Subsystem

National ITS Architecture Services
associated with VDOT ERO Field Equipment:

• MC05 - Roadway Maintenance and Construction - Virginia ER Region -- (Graphic)
• TM01 - Infrastructure-Based Traffic Surveillance - VDOT ERO TOC -- (Graphic)
• TM03 - Surface Street Control - VDOT ERO TOC -- (Graphic)
• TM05 - Freeway Control - VDOT ERO TOC -- (Graphic)
• TM06 - Traffic Information Dissemination - VDOT ERO TOC -- (Graphic)
• TM18 - Drawbridge Management - VDOT ERO Region -- (Graphic)
• TM19 - Roadway Closure Management - Virginia ER Region -- (Graphic)

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

Roadway Barrier System Control

1. The field element shall return barrier system operational status to the controlling center.
2. The field element shall return barrier system fault data to the maintenance center for repair.
3. 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.

Roadway HOV Control

1. The field element shall return fault data for the HOV lane sensors to the center for repair.
2. The field element shall include sensors to detect high-occupancy vehicle (HOV) lane usage, under center control.
3. 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.
4. 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.
5. The field element shall return operational status for the HOV lane sensors to the controlling center.
6. The field element shall provide traffic flow measures and information regarding vehicle occupancy (i.e., lane usage) in HOV lanes to the center.

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.
4. The field element shall remotely process video data and provide an indication of potential incidents to the traffic management center.

Roadway Reversible Lanes

1. The field element shall provide fault data for the reversible lane field equipment to the center.
2. The field element shall provide operational status for the reversible lane field equipment to the center.
3. 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.
4. The field element shall monitor traffic in reversible lanes, including wrong-way vehicles, using sensors and surveillance equipment under center control.

Roadway Traffic Metering

1. The field element shall monitor operation of ramp, interchange, and mainline meters and report to the center any conflicts between received control plans and current system operation.
2. The field element shall return ramp, interchange, and mainline meter operational status to the controlling center.
3. The field element shall return ramp, interchange, and mainline meter fault data to the maintenance center for repair.
4. The field element shall provide indications to the driver that the metering system is active and provide safe transitions between active and inactive status.
5. The field element shall regulate the flow of traffic on ramps, interchanges, and the mainline, under center control.

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 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.
4. 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 collect, digitize, and send multimodal crossing and high occupancy vehicle (HOV), and high occupancy toll (HOT) lane sensor data to the center for further analysis and storage.
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.
5. The field element shall collect, process, and send traffic images to the center for further analysis and distribution.

Roadway Signal Control

1. The field element shall return traffic signal controller fault data to the center.
2. The field element shall return traffic signal controller operational status to the center.
3. The field element shall report current preemption status to the center.
4. The field element shall report the current signal control information to the center.
5. The field element shall control traffic signals under center control.

Roadway Field Device Support

1. The field element shall monitor the operational status of field devices and detects and reports fault conditions.
2. The field element shall detect and report any fault conditions with the equipment being monitored back to its controlling center.
3. The field element shall provide the capability for field personnel to locally control and configure this equipment.
4. The field element shall support an interface with field support equipment to accept installation of updates or configuration of field operations.