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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 information system status


• signal control status


• traffic flow


• traffic images

City of Norfolk STCCity of Norfolk STC Field Equipment

• roadway information system data


• signal control data


• traffic sensor 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:

• Roadway Subsystem

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

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

National ITS Architecture Functional Requirements
associated with City of Norfolk STC 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 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 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.