When the parkway southbound (inbound) is fully closed, traffic will be detoured back to I-279 using Camp Horne Road, Lowries Run Road, Rochester Road, Babcock Boulevard and McKnight Road.
For parkway southbound traffic to Union Avenue in Ross, the detour includes Camp Horne Road, Lowries Run Road, Rochester Road, Perry Highway, Highland Avenue and Gass Road.
Periodic closures of I-279 and the I-279/I-579 HOV lanes are expected to continue through August. A detailed schedule of closures for each upcoming week will be released every Friday until the work is complete. Construction of a new bridge is expected to begin in 2027 as a separate project.
Jacks Run Bridge No. 3 was closed in July 2025 after inspectors identified corrosion in the bridge’s only pier. The Federal Highway Administration is funding the entire $2.8 million project, which began in April.
PennDOT is overseeing the federal funds for the project, with Swank Construction Company of New Kensington serving as the primary contractor. The section of I-279 near Jacks Run Bridge No. 3 is used by an average of 73,367 vehicles daily.