I-80 Interchanges

Erdman Anthony provided final design services for this interchange and expressway reconstruction project as a major engineering subconsultant. The project involves construction of two new interchanges on Interstate 80: a high-speed interchange between I-80 and I-99, and an interchange between I-80 and PA Route 26. Erdman Anthony completed field survey, right-of-way plan development, and structural design support for both interchanges, as well as highway design services for the I-80/Route 26 interchange and reconstruction of 3.5 miles of Interstate 80 mainline.

Erdman Anthony's portion of the structural design included design of two culverts and one set of dual bridges just over 100 feet in length in the I-80/I-99 interchange. Our staff also designed a 520-foot structure in the I-80/PA Route 26 interchange. Maintenance and protection of traffic was a critical issue. Crossovers were designed on Interstate 80, and other measures (such as temporary roadways, lane closures, flagging operations, and detours) were used on two-lane highways in the project vicinity. Other key issues included continuation of a public involvement program established during preliminary engineering, environmental mitigation (minimizing wetland, farmland, and business impacts), and providing expedited property plats for three displacements identified during the project's preliminary phase. ITS equipment was specified for both interchanges, including closed-circuit cameras and pavement sensors that automatically determine when the bridges need to be de-iced.

Project Details


Centre County, PA


Pennsylvania Department of Transportation, Engineering District 2-0

Project Contact

Robert Leonard, PE
  • Robert Leonard, PE
  • 717-766-1741 x 5006
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