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Chesapeake Bay Bridge-Tunnel Field Equipment

Status:

Existing

Definition:

These devices are located on the Chesapeake Bay Bridge - Tunnel and are controlled by operators in the Chesapeake Bay Bridge - Tunnel toll plaza which aids them in monitoring and managing traffic conditions.

Stakeholder:

Chesapeake Bay Bridge and Tunnel Commission

Architecture Flow Diagrams
which include Chesapeake Bay Bridge-Tunnel Field Equipment:

• Chesapeake Bay Bridge-Tunnel Field Equipment Chesapeake Bay Bridge-Tunnel TOC

Architecture Flows
to/from the Chesapeake Bay Bridge-Tunnel Field Equipment:

Chesapeake Bay Bridge-Tunnel Field Equipment Chesapeake Bay Bridge-Tunnel TOC

• barrier system status


• environmental sensor data


• reversible lane status


• roadway information system status


• signal control status


• traffic images

Chesapeake Bay Bridge-Tunnel TOCChesapeake Bay Bridge-Tunnel Field Equipment

• barrier system control


• environmental sensors control


• reversible lane control


• roadway information system data


• signal control data


• video surveillance control

National ITS Architecture Subsystems
mapped to the Chesapeake Bay Bridge-Tunnel Field Equipment:

• Roadway Subsystem

National ITS Architecture Services
associated with Chesapeake Bay Bridge-Tunnel Field Equipment:

• ATMS01 - Network Surveillance - Chesapeake Bay Bridge - Tunnel TOC -- (Graphic)
• ATMS03 - Surface Street Control - Chesapeake Bay Bridge - Tunnel TOC -- (Graphic)
• ATMS04 - Freeway Control - Chesapeake Bay Bridge -Tunnel TOC -- (Graphic)
• ATMS06 - Traffic Information Dissemination - Chesapeake Bay Bridge - Tunnel TOC -- (Graphic)
• ATMS21 - Roadway Closure Management - CBBT -- (Graphic)

National ITS Architecture Functional Requirements
associated with Chesapeake Bay Bridge-Tunnel 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 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 return traffic signal controller operational status to the controlling center.
3. The field element shall return traffic signal controller fault data to the maintenance 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 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 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.