Phase: Construction
Location: Westmoreland County
Anticipated cost: $120.7 million

Project Schedule

Preliminary Design:
Environmental Clearance:
Completed 11/13/2019
Right-of-way Acquisition:
Final Design:

Construction Updates & Traffic Restrictions

Single lane restrictions on northbound and southbound Route 51 will be in place between Concord Lane and Finley Road through the evening of Friday, December 8, and between Finley Road and Ridge Road through the evening of Friday, December 22. All lanes will be open through the weekends. All restrictions will be removed for inclement weather as necessary.

In addition, single-lane restrictions in both directions of Route 51 between Concord Lane and Simmons Lane will continue until January 2024. Single-lane restrictions will also occur on the Smithton High Level Bridge to remove and relocate work platforms and containment as necessary. All construction activities will be weather dependent.

Construction at the I-70/Route 51 Interchange began in late 2022 and is expected to continue through 2026. Track construction progress with updated construction photos.

Project Overview

This project includes improvements to I-70 and SR 51. I-70 will be reconstructed to make this section of I-70 similar to other reconstructed sections of I-70 to the east and west. A Diverging Diamond Interchange (DDI) will be constructed to replace the current substandard cloverleaf interchange at I-70/SR 51.

One mile of SR 51 will be reconstructed and widened from south of Ridge Road to north of Concord Lane/Pfile Lane. SR 51 will also be milled and paved from Concord Lane/Pfile Lane to Harper Drive. Finley Road will be relocated behind the GetGo to form a four-way intersection at Route 981 and a left-turn lane will be added from SR 51 to Ridge Road. Planned improvements are detailed in the project overview video below.

An informational project brochure is available to view online or download and print to share project information with the community.

Project Mapping

View project mapping to learn more details about this area.

PennDOT Contact

Name: Dominec Caruso, P.E.
Organization: PennDOT District 12
Title: Assistant Construction Engineer
Phone: 724-439-7286

Construction Contact

Name: Bryan DeAngelis
Organization: PennDOT District 12
Title: Inspector in Charge
Phone: 724-333-0793

Project Overview Video

2023 Construction Activities

Phase 1

Multiple construction activities on existing roadways will continue in 2023, with no impacts to current traffic flow through the interchange.

Route 51 over I-70

The new easternmost structure of the new bridge that will carry the southbound lanes of the DDI traffic pattern is under construction while the existing bridge remains open to traffic.

Wicks installed for embankment remediation
New Ramps

The new DDI ramps will require complex ground improvement work, and crews will place new embankments within the existing cloverleaf interchange this year. Wick drains will be installed to address expected embankment settlement under the new ramps. Near the new Route 51 bridge, column-supported embankments will also be built this season.


In preparation for the widening of I-70, the Cedar Brook Golf Course Tunnel will be extended to the north to allow for the construction of the new westbound offramp in 2024. Other offline work related to widening I-70 will include construction of various stormwater facilities.

Side Road Relocations

The relocation of Finley Road, south of the GetGo station, to create a four-way intersection with Route 51 and Route 981 is expected to be completed in 2023. Smith Road to the northwest of the interchange will also be realigned this year.

Finley Road Improvements
Wheeling & Lake Erie Railroad Bridge
Wheeling & Lake Erie Railroad Bridge Realignment

Construction of the new railroad bridge will begin in 2023, including railroad track realignment and ground improvements and permanent embankments.

Phases 1A/1B/1C

Reconstruction West of the Interchange

Full reconstruction of I-70 west of the interchange is anticipated to be completed in 2023. Reconstruction of this 1,700-foot section of I-70 will require three construction phases:

  • Phase 1A will include the construction of the new westbound shoulder and temporary widening needed to carry westbound traffic during a traffic crossover later this summer.
  • During Phase 1B, westbound traffic will be moved to the Phase 1A temporary roadway while new westbound travel lanes are built.
  • The new eastbound roadway will be built in Phase 1C during fall 2023.

Matthew Smelser Memorial Bridge Rehabilitation and Reconstruction East of the Interchange

Matthew Smelser Memorial Bridge rehabilitation will begin in 2023, including painting the existing steel superstructure, steel repairs, bridge dam replacements, deck repairs, and new parapet blisters for future fence installation. Rehabilitation work will require single-lane closures. First, the westbound lanes will be reduced to a single lane for 17 weeks beginning early May 2023. The eastbound single-lane configuration will begin at the end of June and will also remain in place for 17 weeks.

Approximately 1,100 feet of I-70 will also be under reconstruction related to the work occurring on the Matthew Smelser Memorial Bridge rehabilitation.

Matthew Smelser Memorial Bridge