ITS: Washington County, Pa., ITS system nears completion

First part of system including traffic cams, roundabouts and state’s first diverging diamond interchange to debut later in 2013

Intelligent Transportation Systems ITS News Pittsburgh Post-Gazette March 11, 2013
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A Pennsylvania Department of Transportation (PennDOT) intelligent transportation system (ITS) project in Washington County, Pa., is 95% complete and will begin operation later this year, according to the department.


There will be several elements to the new ITS, including:

  • Traffic camera and signage network: A new network of 21 traffic cameras and eight variable message signs along I-70 will go online later in 2013. The new system will be connected to the existing network in PennDOT District 11, which includes Allegheny County.
  • Roundabouts: One of the centerpieces of the project will be a double roundabout at the misaligned intersection of Route 519, Thomas-Eighty Four Road and Brownlee Road in North Strabane. Up to four additional roundabouts will be built along I-70. Construction will start on the double roundabout in 2014; work will begin on the remaining interchanges the following year.
  • Diverging diamond interchange: The state’s first diverging diamond interchange will be constructed at the intersection of Route 19 and I-70 in South Strabane. The innovative design will move traffic over to the left side in both directions on Route 19 on the approach to I-70; this will allow drivers to turn left onto highway entrance ramps without crossing oncoming traffic. Construction will begin in 2015.

The entire project—a three-year endeavor—carries a cost of $10 million.

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ITS: Washington County, Pa., ITS system nears completion | Roads & Bridges


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