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    District 11 Projects - Allegheny County

    ​I-376 Parkway East - Commercial Street Bridge Replacement

    Project Status

    Step 3 of 4

    Construction

    Next Step:  Completed

    Project Overview

    County: Allegheny
    Municipality: City of Pittsburgh
    State Route: I-376
    Local Name: Commercial Street Bridge
    Project Type: Bridge Replacement
    Construction Start: 2024
    Construction End: Summer 2027
    Last Updated: 11/21/2025

    The $95 million I-376 Commercial Street Bridge Replacement project is between the Edgewood/Swissvale (Exit 77) interchange in Swissvale Borough and Squirrel Hill Tunnel in the City of Pittsburgh spans over Nine Mile Run, Frick Park, and Commercial Street. This project will utilize Accelerated Bridge Construction (ABC) Techniques to laterally slide the new bridge onto the existing alignment of I-376. The Arched Delta Frame Structure will be built just south of the existing Commercial Street Bridge on temporary foundations and will be slid onto the existing alignment once demolition of the existing bridge has occurred.  Work will also include the installation of new overhead signage and eastbound retaining wall, lowering the westbound I-376 off-ramp to Forest Hills/Wilkinsburg Interchange (Exit 78B) to increase vertical clearance under the Parkway East, concrete median barrier replacement, sanitary sewer line relocation, upgrades to guide rail, ITS Devices, Over Height Truck Detection System, and CCTV Cameras, as well as overall site restoration for both Frick Park and the Frick Park walking trail. Motorists can expect single-lane and shoulder restrictions in each direction of I-376 on weekends and weeknights as needed through 2026. Additionally, in 2025, several overnight full closures and detours of eastbound I-376 and a full weekend closure and detour of I-376 in each direction are anticipated to occur.  In 2026, motorists can expect a 25-day full closure and detour of I-376. The overall project is anticipated to conclude in the summer of 2027. The Joseph B. Fay Company is the prime contractor.​​

    Subscribe to news alerts for this project: To help keep motorists informed as work progresses, PennDOT has created an email distribution list for Parkway East traffic advisories and construction updates. Enroll by sending email addresses to ymanyisha@pa.gov​. Please write “Subscribe – Parkway East” in the subject line.​​

    Detour Information

    SCHEDULE CHANGE: Commercial Street/Forward Avenue and Trail Closure Nov. 24, 2025 - Feb. 6, 2026

    Commercial St./Forward Ave. & Nine Mile Run Trail closure has been rescheduled to Nov. 24, 2025 - Feb. 6, 2026 for bridge construction.

    I-376 will remain open during this closure. Crews will lift beams and move heavy equipment/material over the roadway and trail — closures are for everyone’s safety. Get the full details in our press release.

    Posted Detour

    From Commercial Street on the Swisshelm Park side:

    • From Commercial Street, turn onto Whipple Street
    • Turn left onto Monongahela Avenue
    • Turn left onto S Braddock Avenue
    • Turn left onto Forbes Avenue
    • Turn left onto Beechwood Boulevard
    • Continue to Forward Avenue
    • End Detour

    From Forward Avenue on the Squirrel Hill side:

    • Same detour in the opposite direction
    Detour Map of Commercial Street/Forward Ave Road and Trail Closure
    View Detour Map (PDF)

    Contact Information

    Artist Renderings of Project

    Commercial Street Bridge rendering

    Accessibility

    The project documents can be made available in alternative languages or formats if requested. If you need translation or interpretation services, have special needs, or have concerns that require individual attention, please contact the Project Manager listed above.

    Title VI

    Pursuant to the Title VI of the Civil Rights Act of 1964, PennDOT does not discriminate on the basis of race, color, national origin, gender, age, or disability. If you feel that you have been denied the benefits of, or participation in a PennDOT program or activity, you may contact the PennDOT, Bureau of Equal Opportunity, DBE/Title VI Division at 717-787-5891.