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City of Chesapeake TMC Field Equipment

Status:

Existing

Definition:

These devices are typically located along the roadside and are controlled by operators in the TMC which aids them in monitoring and managing traffic conditions. The field equipment that aids operators in performing their functions are: Traffic Signal Systems and CCTV Cameras.

Stakeholder:

City of Chesapeake Public Works Department

Architecture Flow Diagrams
which include City of Chesapeake TMC Field Equipment:

• City of Chesapeake TMC Field Equipment City of Chesapeake TMC

Architecture Flows
to/from the City of Chesapeake TMC Field Equipment:

City of Chesapeake TMC Field Equipment City of Chesapeake TMC

• environmental sensor data


• request for right-of-way


• signal control status


• traffic flow


• traffic images

City of Chesapeake TMCCity of Chesapeake TMC Field Equipment

• environmental sensors control


• signal control data


• traffic sensor control


• video surveillance control

National ITS Architecture Subsystems
mapped to the City of Chesapeake TMC Field Equipment:

• Roadway Subsystem

National ITS Architecture Services
associated with City of Chesapeake TMC Field Equipment:

• ATMS01 - Network Surveillance - City of Chesapeake TMC -- (Graphic)
• ATMS03 - Surface Street Control - City of Chesapeake TMC -- (Graphic)
• ATMS06 - Traffic Information Dissemination - City of Chesapeake TMC -- (Graphic)
• ATMS20 - Drawbridge Management - City of Chesapeake -- (Graphic)
• ATMS21 - Roadway Closure Management - Cities -- (Graphic)
• MC07 - Roadway Maintenance and Construction - Cities -- (Graphic)

National ITS Architecture Functional Requirements
associated with City of Chesapeake TMC 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 collect pedestrian images and pedestrian sensor data, and respond to pedestrian crossing requests via display, audio signal, or other manner.
3. The field element shall provide the capability to notify the traffic management center that a pedestrian has requested right-of-way and when the request was or will be granted (request for right-of-way).
4. 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.
5. 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.
6. The field element shall return traffic signal controller operational status to the controlling center.
7. 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 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).

Roadway Data Collection

1. The field element shall collect traffic, road, and environmental conditions information.
2. The field element shall include the sensors and supporting roadside devices that sense, collect, and send traffic, road, and environmental conditions information to a center for archival.
3. The field element shall collect sensor status and sensor faults from roadside equipment and send it along with the recorded data to a center for archival.