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Henrico County TOC

Status:

Existing

Definition:

The Henrico County TOC serves Henrico County and includes computer software and control of Henrico County signals including emergency signal preemption.

Stakeholder:

Henrico County

Architecture Flow Diagrams
which include Henrico County TOC:

• Henrico County TOC Henrico County TOC Field Equipment
• Henrico County TOC VDOT CRO TOC/ATMS

Architecture Flows
to/from the Henrico County TOC:

Henrico County TOC Henrico County TOC Field Equipment

• signal control commands


• signal control device configuration


• signal control plans


• signal system configuration

Henrico County TOC VDOT CRO TOC/ATMS

• device control request


• device data


• device status


• incident information


• road network conditions


• traffic images

Henrico County TOC Field EquipmentHenrico County TOC

• right-of-way request notification


• signal control status


• signal fault data

VDOT CRO TOC/ATMSHenrico County TOC

• device control request


• device data


• device status


• incident information


• road network conditions


• traffic images

National ITS Architecture Subsystems
mapped to the Henrico County TOC:

• Archived Data User System Terminator
• Traffic Management Center Subsystem

National ITS Architecture Services
associated with Henrico County TOC:

• PS01 - Emergency Call-Taking and Dispatch - Henrico County -- (Graphic)
• PS03 - Emergency Vehicle Preemption - Henrico County -- (Graphic)
• TM03 - Traffic Signal Control - Henrico County -- (Graphic)
• TM07 - Regional Traffic Management (PSAP I-64 and I-95 CIP) -- (Graphic)

National ITS Architecture Functional Requirements
associated with Henrico County TOC:

TMC Signal Control

1. The center shall manage (define, store and modify) control plans to coordinate signalized intersections, to be engaged at the direction of center personnel or according to a daily schedule.
2. The center shall remotely control traffic signal controllers.
3. The center shall accept notifications of pedestrian calls.
4. The center shall collect traffic signal controller fault data from the field.
5. The center shall collect traffic signal controller operational status and compare against the control information sent by the center.

TMC Regional Traffic Management

1. The center shall exchange traffic information with other traffic management centers including incident information, congestion data, traffic data, signal timing plans, and real-time signal control information.
2. The center shall exchange traffic control information with other traffic management centers to support remote monitoring and control of traffic management devices (e.g. signs, sensors, signals, cameras, etc.).