Surface Street Signal Management

VDOT NOVA STSS installs, monitors, controls and maintains over 1000 traffic signals in the three counties: Fairfax, Loudoun, and Prince William. VDOT NOVA STSS is able to manage traffic flow continuously, monitor the real-time signal status, collect traffic flow information, and adjust signal timing from a centralized location The STSS currently includes roughly 1200 intersections and the number keeps increasing as the region grows. Surface Street Management also includes management of roadside field devices on arterials such as traffic controllers for the traffic signal system, CCTV, and vehicle detection equipment. Several local cities also manage or maintain signal systems on portions of arterials.

Service Packages

• TM01: Infrastructure-Based Traffic Surveillance
• TM03: Traffic Signal Control
• TM06: Traffic Information Dissemination
• TM07: Regional Traffic Management
• TM18: Drawbridge Management
• TM19: Roadway Closure Management

Stakeholders

• VDOT Northern District Operations

Roles and Responsibilities

• Adjust signal timing in real-time from a centralized traffic signal control system.
• Continuously monitor the real-time signal status, collect traffic flow information using CCTV and loop detectors
• Coordinate with other regional agencies during emergencies and evacuation for emergency traffic control
• Install, and maintains over 1400 traffic signals in the three counties - Fairfax, Prince William and Loudon. It also operates Fredericksburg Signal System.
• Manage regional traffic control efforts and assist in coordinating traffic across boundaries
• Monitor maintenance, construction, and winter road conditions along key arterials
• Recive signal priority and preemption requests where available
• Use Surveillance technologies to detect and verify incidents



• Local Traffic Agencies

Roles and Responsibilities

• Coordinate with other regional agencies during emergencies and evacuation for emergency traffic control
• Maintain field equipment including traffic signals, and vehicle detection equipment
• Manage regional traffic control efforts and assist in coordinating traffic across boundaries
• Monitor maintenance, construction, and winter road conditions along key arterials
• Receive signal priority and preemption requests where available