Best options for getting around the Commercial St and Nine Mile Run Trail closure
PennDOT is in the process of replacing the Commercial St Bridge that carries 376 over Frick Park. It’s a very complicated project, and they are now at a place where they need to again close some streets around the construction, including to people on bikes or on foot. The nature of the construction requires a full closure as there are serious safety issues due to overhead work and other worksite hazards. PennDOT understandably wants to be sure to keep people safe.
Later this summer, PennDOT plans to close not only Commercial St and the Nine Mile Run Trail again, but also I-376 itself. Tentatively, from July 10 through August 3, 2026, we can expect a 25-day full closure and detour of these roads. The overall project is anticipated to conclude in the summer of 2027.
Find out more on May 13
Public awareness throughout the construction process is very important to the success of the project. This briefing offers the opportunity to hear about the upcoming traffic closure and future work plans, with a question-and-answer session with the project team.
Wednesday, May 13, 2026 / 5:00 PM to 6:30 PM
Location: Online only
To gain access to the meeting, please visit the project webpage below, where the link will be provided at the top of the page several days prior.
Commercial Street Bridge Replacement Project
Riding around the closure
What this closure means is that Nine Mile Run Trail users will still be able to use the trail, but will not be able to connect between the north and south halves of the trail at Commercial St, as you would need to cross the construction site to do so. From the South (Duck Hollow) trail users will be able to access the parking lot on Commercial St, but will need to turn around or continue up the significant climb eastbound on Commercial to Swisshelm Park. From the north (Frick Park), users will be able to get to Commercial, but again, will either need to turn around, or continue up and climb westbound on Commercial to Squirrel Hill.
There will also be times where nobody will be allowed in the surrounding area due to safety concerns.
For those who use Nine Mile Run for bike commuting between Browns Hill Rd and the East End, we recommend avoiding the area all together. This can be done fairly reasonably using Parkview Blvd through Summerset at Frick and over to Commercial St (see map).
We’d like to stress that it’s important to respect the road and construction closure for this project as it can be very dangerous to cross the site, so please plan ahead and use our Pittsburgh Bike Map site to help you with a route.
For full updates on the bridge replacement, see PennDOT’s dedicated project page.
NEWSLETTER