PA ROUTE 51 TO I-376 of the Mon Fayette Expressway

Public Involvement

The Mon/Fayette PA Route 51 to I-376 Project is the final of four Mon/Fayette projects that would provide a four-lane, limited access expressway from I-68 in West Virginia to I-376 in the Pittsburgh area. This final project would extend from PA Route 51 to I-376. The PA Route 51 to I-376 Project obtained a Record of Decision from the FHWA in December 2004 identifying the Selected Alternative to be designed and constructed. That alternative moved into the Final Design process but was put on hold in 2009 due to a lack of sufficient funding for construction. With the passage of Act 89 in 2013, funding is once again available to move this project forward. The PTC has made some modifications to the 2004 Selected Alternative and is reevaluating the impacts of this project on the environment.

Southern Section Plans

The first section of the Mon/Fayette State Route 51 to I-376 Project to be constructed will be south of the Monongahela River.

This is an eight-mile stretch between PA Route 51 in Jefferson Hills and PA Route 837 in Duquesne. This stretch will be divided into seven construction sections – all with different construction timelines as depicted below.

The design sections will include the areas of Jefferson Hills, West Mifflin, Dravosburg, the City of Duquesne and the City of Clairton.

Click on the map to view the current design. Zoom in and out to view details for areas of interest.


It is anticipated that construction of the first section could begin as early as 2022. Construction costs for the entire southern section are estimated to be approximately $680 million with an overall total cost of $1.01 billion which includes the design work, utility moves, tolling equipment and other items.

Most Recent Construction Section Maps


Virtual Presentation for Dravosburg/West Mifflin Design Modifications

The Pennsylvania Turnpike Commission invites you to view a special presentation concerning design modifications to the PA Route 51 to I-376 Mon/Fayette Expressway Project being considered in the area of West Mifflin and Dravosburg – specifically between Camp Hollow Road and Pittsburgh-McKeesport Boulevard.

The design modifications in this area are due to recent findings from geotechnical explorations (drilling), utility relocation issues, ongoing assessment of environmental impacts and future maintenance considerations.

Visit this PennDOT web page to learn more about round-abouts and their safety advantages.

April 2018 Public Plan Display Graphics and Maps

Thanks to all those who attended the April 3rd, 4th, and 5th, 2018 Public Plans Display meetings at the Georgetown Centre. The graphics and maps presented at the meeting are provided below.

August 2016 Public Meeting Graphics and Maps

Thank you to the hundreds of people who attended our August 2016 public meetings. Your feedback and questions were greatly appreciated. Please feel free to download the displays or view the project maps shown at those meetings, which are listed below. More public meetings are being planned for 2018 once PA Turnpike engineers finish the timeline for this project.

Project Maps

The Mapping Boards below illustrate the Mon Fayette Expressway alignment. This table provides a key to the Mapping Board that provides details for each municipality. Please note that although the map files have been compressed as much as possible, some are large so make take time to download.

Municipality Mapping Board
Borough of Jefferson Hills A
Borough of Dravosburg B
Borough of West Mifflin A, B, C
City of Duquesne C
North Versailles Township C, D
East Pittsburgh Borough C, D
Borough of Turtle Creek D
Municipality of Penn Hills E
Municipality of Monroeville D, E
Wilkins Township D, E