Milepost 57-67 Design

Project Overview

This ten mile Total Reconstruction and Widening Project (Project) of the mainline Pennsylvania Turnpike between Mileposts (MP) 57 to 67 is located in Allegheny and Westmoreland Counties and in the municipalities of Monroeville, Murrysville, Hempfield Township, Penn Township, Manor Borough, Irwin Borough, North Irwin Borough and North Huntingdon Township. The Project will involve widening the Turnpike from two to three lanes in each direction and reconstruction of the Irwin Interchange along with improving the highway to current standards. The Project does not include the Pittsburgh Interchange, Northern Pike or State Route 130. The Project cost estimate is more than $300 million.

Preliminary design for this project began in 2012 and was completed in 2016. Because bridges over the mainline need to be replaced in order to accommodate the wider roadway widths, the replacement of the Trafford Road Bridge over the Turnpike, the Trafford Road Bridge over Lyons Run, and the Lyons Run culvert were advanced as a stand-alone project. The final design began in 2015 and construction was completed in 2019.

The Harvison Road Bridge (T-869) in Penn Township will be removed. Design for the bridge removal and for a cul-de-sac on the eastern end of Harvison Road is complete. Construction is anticipated to begin in mid-2024, with completion by the end of 2025.

Final design of the mainline widening is currently in progress and includes right-of-way acquisition and environmental permitting, along with design efforts for structures, traffic control, utility relocations, roadway, drainage, and stormwater management.

Construction of the mainline widening will be split into two sections. For the east section (MP 61 to MP 67), construction is anticipated to begin in the fall of 2028. Construction of the west section (MP 57 to MP 61) will be determined by the first section's schedule and available funding.