The signal system in Columbus, Ohio, had become outdated and in need of constant repair. In response, the city implemented a multiphased project to create a modern, open-architecture, computerized traffic signal system and communications network.

Project design of Phase A, led by HNTB, required a complete overhaul of the outdated system, including:

●    New head-end signal and camera control software systems
●    Approximately 700 miles of fiber optic cable, several hundred wireless radios and 60 network hubs
●    Upgraded traffic signal control equipment at more than 1,200 intersections
●    Approximately 150 traffic surveillance closed-circuit TV sites
●    A new traffic management center

The TMC is the nerve center of a “smart” grid, monitoring many of the region’s signalized intersections, traffic surveillance monitors, pavement weather sensors, and snow and ice crews. This will lead to reduced travel times, vehicle crashes and emissions.

Columbus is enjoying improved traffic signal coordination and operations, and, ultimately, will benefit from more efficient regional traffic flow on congested roadways.

●    Interoperable system establishes connectivity among city, ODOT and regional agencies
●    Columbus, Ohio, creates more efficient traffic flow and snow removal
●    Participants share and conserve limited government resources

Location: Columbus, OH

Client: Ohio Department of Transportation