This project involves the full depth reconstruction and widening of approximately 2.39 miles of the Pennsylvania Turnpike between the Cranberry Interchange (Milepost 28.49) to the Warrendale Toll Plaza (Milepost 30.88), resulting in one additional travel lane in each direction. The project also includes the lowering and reconstruction of approximately 525 feet of T-478 (Mt. Pleasant Road) in order to obtain proper vertical clearance under the PA Turnpike. The project is located in Marshall Township in Allegheny County and Cranberry Township in Butler County.
Included with this project is the replacement of three (3) mainline bridges in order to accommodate the widened roadway section. The existing structures consist of a two-span, composite steel curved plate girder bridge (WB-402) which carries the PA Turnpike over SR 0019 (Perry Highway), a single span composite pre-stressed concrete PA Bulb-Tee beam bridge (WB-403) which carries the PA Turnpike over Mt. Pleasant Road, and a concrete slab bridge (WB-401) which carries the PA Turnpike over an unnamed tributary of Brush Creek.
As part of a separate Early Action project, the bridge carrying Thorn Hill Road over the PA Turnpike (WB-400) has been replaced to accommodate the widened PA Turnpike roadway section. Construction of the Early Action project was completed in Fall 2015.
Design for the project began in 2012 and was completed in 2019. Project was advertised for construction and bid in December 2019. Construction will begin in March of 2020 with an anticipated completion date of September 2022.
For information on other sections of the Pennsylvania Turnpike currently in construction or design, please visit the Major Design and Construction Projects homepage.
Typical Roadway Sections
At project completion, the section will consist of 6 travel lanes (3 westbound and 3 eastbound), with a 26-foot median, and 12-foot outside shoulders.