SAI was responsible for the fast-track conceptual design of roadway, traffic control, signing and pavement marking and cross sections for replacement of 7.8 miles of westbound lanes of I-80 in Jefferson County. Structure preservation and eastbound overlay plans were developed by the District and incorporated in the design/build contract.
- 7.8 mile of rural limited-access interstate highway.
- Roadway geometry needed to match all bridge elevations, airport interchange elevations, and stop start elevations while minimizing sliver fills and removing all subbase materials.
- Deck improvements for all associated structures were designed by the District.
- Project was a fast-track conceptual design with Federal oversight.
- Shared also plan responsibility with the District.
- District was responsible for the east bound overlay project which was performed in conjunction with the west bound reconstruction.
- West bound highway was realigned 1/2 mile to eliminate a design exception.
- Use of Lydar mapping supported with pavement edge survey.
- Traffic maintained during construction via a crossover to utilize eastbound lanes with reduction to one-lane.
Client Owner: Pennsylvania Department of Transportation, District 10-0
Construction Cost: $32,700,000