The capital cost to implement adaptive signal control at 45 intersections was estimated at $3 million.

Experience implementing adaptive signal control across multiple townships.

Made Public Date


United States

Summary Information

The information in this source report was derived from interviews with transportation professionals and agencies responsible for planning and operations in Franklin County, Pennsylvania. In District 8 a plan was developed by the Pennsylvania Department of Transportation (PennDOT) to implement adaptive signal control upgrades at 45 intersections. The overall goal was to improve traffic conditions on the US-30 corridor and a commercial area off I-81 at Exit 17 along Norland Avenue and Walker Road. InSync was selected as a traffic management system to automatically adjust signal timing and optimize traffic flow between intersections. Traffic control boxes at equipped intersections were connected using copper wire and fiber optic cable.

  • Start-up costs including initial coordination at 45 intersections was estimated to cost about $3 million. This number includes $55,000 per intersection based on PennDOT's experience with recent smart traffic projects and an additional $500,000 required to establish communication links between intersections.
  • Subsequent O&M costs were estimated at $750 per year per signalized intersection.
System Cost

Adaptive signal control: $55K per intersection. O&M costs: $750 per year per intersection Communication links (45 intersections): $500K.