Full closures of northbound Interstate 279 and the I-279/I-579 High Occupancy Vehicle lanes in Allegheny County will end after Tuesday.
The Allegheny County Department of Public Works announced that work on the Jacks Run Bridge No. 3 demolition project will transition to overnight single-lane closures starting Wednesday.
Jacks Run Bridge No. 3 carries Jacks Run Road over I-279 between Bellevue Road/Bellpark Drive and Kane Lane in Ross Township. The county closed the bridge on July 3, 2025, and demolition work began on April 27, 2026, followed by highway closures starting June 15, 2026.
The stretch of I-279 near the bridge handles an average daily traffic volume of 73,367 vehicles.
The upcoming project schedule is as follows:
Friday night to Saturday morning
I-279 northbound (outbound) will be fully closed between the McKnight Road/Evergreen Road exit ramp (Exit 4) and the I-279 North on-ramp from Camp Horne Road from two hours after the 7 p.m. Pittsburgh Steelers game concludes until 9 a.m.
The I-279/I-579 HOV northbound (outbound) lanes will be closed from two hours after the Steelers game concludes until 10 a.m.
The left lane of I-279 southbound (inbound) under Jacks Run Road will be closed from 7 p.m. to 9 a.m.
Monday night to Tuesday morning
I-279 northbound (outbound) will be fully closed between the McKnight Road/Evergreen Road exit ramp (Exit 4) and the I-279 North on-ramp from Camp Horne Road from 9 p.m. to 5 a.m.
The I-279/I-579 HOV northbound (outbound) lanes will be closed from 8 p.m. to 6 a.m.
The left lane of I-279 southbound (inbound) under Jacks Run Road will be closed from 7 p.m. to 6 a.m.
Tuesday night to Wednesday morning
I-279 northbound (outbound) will be fully closed between the McKnight Road/Evergreen Road exit ramp (Exit 4) and the I-279 North on-ramp from Camp Horne Road from 9 p.m. to 5 a.m.
The I-279/I-579 HOV northbound (outbound) lanes will be closed from 8 p.m. to 6 a.m.
The left lane of I-279 southbound (inbound) under Jacks Run Road will be closed from 7 p.m. to 6 a.m.
After full closures
Following the full closures on Tuesday night, the right lane of I-279 northbound and the left lane of I-279 southbound beneath the bridge will be closed between 7 p.m. and 6 a.m. on weekdays and 7 p.m. and 9 a.m. on weekends until the project ends next month. When there is a Pittsburgh Pirates home game, the single-lane closures will start two hours after the game ends.
When the right lane of I-279 northbound is closed, the I-279 northbound on-ramp from Cemetery Lane will also be closed. Traffic will be detoured using Perry Highway, Rochester Road, Lowries Run Road, and Camp Horne Road.
When I-279 northbound (outbound) is fully closed:
- I-279 northbound traffic will be detoured back to I-279 using McKnight Road, Babcock Boulevard, Rochester Road, Lowries Run Road, and Camp Horne Road.
- Union Avenue traffic to I-279 northbound will be detoured using Gass Road, Highland Avenue, Perry Highway, Rochester Road, Lowries Run Road, and Camp Horne Road.
- Cemetery Lane traffic to I-279 northbound will be detoured using Perry Highway, Rochester Road, Lowries Run Road, and Camp Horne Road.
Construction of a new replacement bridge will take place as a separate project expected to begin next year.
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