U.S. 422 Improvements

Counties: Montgomery, Chester
State Route: U.S. Route 422
Project Type: Roadway reconstruction, bridge replacement, pavement repair, concrete patching, safety enhancements, other construction activities 
Project Length: U.S. 202 to the Montgomery County/Berks County line
Contracts: 10 projects to reconstruct and improve U.S. 422

PennDOT's comprehensive, multi-phase U.S. 422 Improvement Program spans more than 20 miles from U.S. 202 in King of Prussia to the Montgomery County/Berks County line.  

Since 2012, PennDOT has completed 7 major projects and invested $276.1 million to reconstruct and improve the U.S. 422 corridor in Montgomery and Chester counties. 

Construction of a new U.S. 422 project started in 2023,  Section M1B, which is located in Lower Pottsgrove Township, Montgomery County.

Please select one of the projects from the drop-down menu below to view more information.

Construction began in November 2023 on an $83.6 million project to reconstruct and improve a 2.1-mile section of eastbound and westbound U.S. 422 (Section M1B) from just west of Porter Road to Evergreen Road where the ramp tapers at the Sanatoga Interchange in Lower Pottsgrove Township, Montgomery County.

​The U.S. 422 Section M2B project involves the total reconstruction of 1.5 miles of limited access expressway on mostly existing alignment. U.S. 422 will be reconstructed with a 9-foot left shoulder, two 12-foot lanes, and a 12-foot right shoulder in each direction of travel. A concrete median barrier will be constructed to separate eastbound and westbound traffic. The western work limit is approximately 850 feet east of the Schuylkill River Bridge between Stowe and Route 100 (Pottstown Pike) Interchanges.  Full-depth reconstruction will match the adjacent project limit of the U.S. 422 Section M2A project. The eastern limit of work is approximately 2,370 feet west of the Keim Street overpass. Section M2B also includes median reconstruction beyond the limits of full-depth reconstruction at the eastern limit.

U.S. 422 Section M03 involves the total reconstruction of nearly one mile of U.S. 422 from approximately 2,370 feet west of the Keim Street overpass to approximately 100 feet west of the Schuylkill River Crossing No. 2 Bridge. 

The purpose of this project is to maintain and extend the useful life of the existing pavement of U.S. 422 in Montgomery County between Route 29 (Collegeville Road) and Township Line Road Interchanges in Upper Providence and Limerick townships, including the on and off ramps.