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VDOT NRO MPSTOC - TOC Detection

Status:

Existing

Definition:

This element represents the detection elements that are located along the roadside and are controlled by operators in the VDOT NRO MPSTOC - TOC/ATMS which aids them in monitoring and managing traffic conditions. An example is a vehicle detector on the roadway.

Stakeholder:

VDOT NRO

Architecture Flow Diagrams
which include VDOT NRO MPSTOC - TOC Detection:

• VDOT NRO MPSTOC - TOC Detection VDOT NRO MPSTOC - TOC/ATMS

Architecture Flows
to/from the VDOT NRO MPSTOC - TOC Detection:

VDOT NRO MPSTOC - TOC Detection VDOT NRO MPSTOC - TOC/ATMS

• signal control status


• signal fault data


• traffic detector data


• traffic metering status

VDOT NRO MPSTOC - TOC/ATMSVDOT NRO MPSTOC - TOC Detection

• signal control commands


• signal control device configuration


• signal control plans


• signal system configuration


• traffic detector control


• traffic metering control

National ITS Architecture Subsystems
mapped to the VDOT NRO MPSTOC - TOC Detection:

• Connected Vehicle Roadside Equipment Subsystem
• ITS Roadway Equipment Subsystem

National ITS Architecture Services
associated with VDOT NRO MPSTOC - TOC Detection:

• TM01 - Infrastructure-Based Traffic Surveillance - VDOT NRO MPSTOC TOC/ATMS -- (Graphic)
• TM05 - Freeway Control - VDOT NRO MPSTOC - TOC/ATMS -- (Graphic)
• TM20 - Variable Speed Limits (VDOT NRO VSL Project) -- (Graphic)

National ITS Architecture Functional Requirements
associated with VDOT NRO MPSTOC - TOC Detection:

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 monitor traffic in reversible lanes, including wrong-way vehicles, using sensors and surveillance equipment under center control.

Roadway Speed Monitoring and Warning

1. The field element shall return operational status for the vehicle speed sensors to the enforcement agency.
2. If the speed detected by vehicle speed sensors is determined to be excessive, the field element shall provide a safe speed advisory to passing drivers via a driver information system (such as portable messages signs, field to vehicle communications to in-vehicle signing systems, etc.).
3. The field element shall include sensors to detect vehicle speeds, under traffic or maintenance center control.
4. The field element shall return fault data for the vehicle speed sensors to the controlling center for repair.

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.

RSE Traffic Monitoring

1. The field element shall aggregate and forward collected probe information to the center.

RSE Environmental Monitoring

1. The field element shall communicate with on-board equipment on passing vehicles to collect current status information and a record of previous events (e.g., temperature, wiper status, headlight status, traction control system status) that can be used to determine road and surface weather conditions.