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    District 1 Projects -Mercer County

    Route 518 and Mercer Avenue Intersection Safety Project

    Project Status

    Step 2 of 4

    Design

    Next Step:  Construction

    Public Outreach

    Virtual Plans Display

    ​The virtual plans display will be available online from February 24, 2026 through March 11, 2026. 

    Public Comment Period

    The public comment period, where the community is encouraged to respond with questions and concerns will be from February 24, 2026 through March 11, 2026. 

    Submit a Comment

    Project Overview

    County: Mercer 
    Municipality: Sharpsville Borough
    State Route: Route 518 and Route 3025
    Local Name: South Walnut Street and Mercer Avenue
    Project Type: Safety Improvement
    MPMS Number: 111157
    Proposed Construction Start: 2027
    Last Updated: 02/23/2026

    This is a proposed project to improve the safety at the intersection of Route 518 and Mercer Avenue in Sharpsville Borough, Mercer County.

    Proposed improvements at Route 518 (South Walnut Street) and Mercer Avenue (Route 3025) include replacing existing traffic signal equipment and widening Route 518 to add dedicated left turn lanes.

    The project will also include radii improvements and ADA pedestrian improvements, including new pedestrian signal equipment, at all corners. Work will also include drainage upgrades, milling, paving, sign updates, and roadway paint.

    Work is expected to occur during the 2027 construction season.

    Plans call for construction to be completed in two phases. Phase 1 will concentrate on the northern side of the intersection and Phase 2 will be on the southern side. 

    Proposed Traffic Impacts

    During Phase 1, a detour will be needed for Mercer Avenue north of the intersection. The proposed detour is under a half mile and uses Line Street and Route 518. Pedestrians will be temporarily redirected to the southern side of Route 518.

    During Phase 2, a detour will be needed for Mercer Avenue south of the intersection. The proposed 2.2-mile detour route use Hazen Street (Route 3016), South Seventh Street (Route 3025) and Route 518. Pedestrians will be temporarily redirected to the northern side of Route 518.

    The project plans also call for use of temporary lane restrictions with traffic controlled by flaggers.

    Contact Information

    Mike Hunkele
    PennDOT Project Manager
    814-678-7173 
    mhunkele@pa.gov

    Jill Harry
    Press Officer
    814-678-5035
    jharry@pa.gov

    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.