Drivers planning to take the Parkway East (I-376) into the city will have to find an alternate route this weekend.
The inbound Squirrel Hill Tunnel will be closed from 9 p.m. Friday to 5 a.m. Monday.
According to PennDOT spokesman Steve Cowan, crews will be paving the road surface of the inbound tunnel and replacing the bridge expansion dam.
“Bridges flex, so there is an expansion dam between the two portions of the bridges,” Cowan said. “It’s minor work compared to the paving of the tunnel. That’s the main work.”