---

VDOT Monitor-Merrimac Memorial Bridge-Tunnel (MMMBT) 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.

Stakeholder:

VDOT ERO Region

Architecture Flow Diagrams
which include VDOT Monitor-Merrimac Memorial Bridge-Tunnel (MMMBT) TOC Field Equipment:

• VDOT Monitor-Merrimac Memorial Bridge-Tunnel (MMMBT) TOC Field Equipment VDOT Monitor-Merrimac Memorial Bridge-Tunnel (MMMBT) TOC

Architecture Flows
to/from the VDOT Monitor-Merrimac Memorial Bridge-Tunnel (MMMBT) TOC Field Equipment:

VDOT Monitor-Merrimac Memorial Bridge-Tunnel (MMMBT) TOC Field Equipment VDOT Monitor-Merrimac Memorial Bridge-Tunnel (MMMBT) TOC

• barrier system status


• environmental sensor data


• freeway control status


• roadway information system status


• signal control status


• traffic flow


• traffic images

VDOT Monitor-Merrimac Memorial Bridge-Tunnel (MMMBT) TOCVDOT Monitor-Merrimac Memorial Bridge-Tunnel (MMMBT) TOC Field Equipment

• barrier system control


• environmental sensors control


• freeway control data


• roadway information system data


• signal control data


• traffic sensor control


• video surveillance control

National ITS Architecture Subsystems
mapped to the VDOT Monitor-Merrimac Memorial Bridge-Tunnel (MMMBT) TOC Field Equipment:

• Roadway Subsystem

National ITS Architecture Services
associated with VDOT Monitor-Merrimac Memorial Bridge-Tunnel (MMMBT) TOC Field Equipment:

• ATMS01 - Network Surveillance - VDOT Monitor - Merrimac Memorial Bridge - Tunnel(MMMBT) TOC -- (Graphic)
• ATMS04 - Freeway Control - VDOT Monitor - Merrimac Memorial Bridge - Tunnel(MMMBT) TOC -- (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 Monitor-Merrimac Memorial Bridge-Tunnel (MMMBT) 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 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 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 pedestrian information systems under center control (e.g. warning pedestrians of a potential hazard, or providing mandatory instructions as to the availability of pedestrian access).
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.