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City of Norfolk STC Field Equipment

Status:

Existing

Definition:

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

Stakeholder:

City of Norfolk Public Works Department

Architecture Flow Diagrams
which include City of Norfolk STC Field Equipment:

• City of Norfolk STC Field Equipment City of Norfolk STC
• City of Norfolk STC Field Equipment Hampton Roads Local Public Safety Vehicles

Architecture Flows
to/from the City of Norfolk STC Field Equipment:

City of Norfolk STC Field Equipment City of Norfolk STC

• roadway dynamic signage status


• signal control status


• signal fault data


• traffic detector data


• traffic images

City of Norfolk STCCity of Norfolk STC Field Equipment

• roadway dynamic signage data


• signal control commands


• signal control device configuration


• signal control plans


• signal system configuration


• traffic detector control


• video surveillance control

Hampton Roads Local Public Safety VehiclesCity of Norfolk STC Field Equipment

• local signal preemption request

National ITS Architecture Subsystems
mapped to the City of Norfolk STC Field Equipment:

• Connected Vehicle Roadside Equipment Subsystem
• ITS Roadway Equipment Subsystem

National ITS Architecture Services
associated with City of Norfolk STC Field Equipment:

• MC05 - Roadway Maintenance and Construction - Cities -- (Graphic)
• TM01 - Infrastructure-Based Traffic Surveillance - City of Norfolk STC -- (Graphic)
• TM03 - Surface Street Control - City of Norfolk STC -- (Graphic)
• TM06 - Traffic Information Dissemination - City of Norfolk STC -- (Graphic)
• TM19 - Roadway Closure Management - Cities -- (Graphic)

National ITS Architecture Functional Requirements
associated with City of Norfolk STC Field Equipment:

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 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 return sensor and CCTV system operational status to the controlling center.
3. The field element shall return sensor and CCTV system fault data to the controlling center for repair.
4. 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 provide the capability to notify the traffic management center of pedestrian calls and pedestrian accommodations.
6. The field element shall control traffic signals under center control.
7. The field element shall respond to pedestrian crossing requests by accommodating the pedestrian crossing.

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.