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U.S. 422 West to Close Thursday Night for Construction in Pottstown Area

Dec 21, 2017 • by PennDOT
PA Department of Transportation

Temporary ramp from U.S. 422 West to Stowe Interchange to close

King of Prussia, PA – Westbound U.S. 422 will be closed and detoured from Route 100 (Pottstown Pike) to the split with Benjamin Franklin Highway in West Pottsgrove Township, Montgomery County, on Thursday, December 21, from 9:00 PM to 5:00 AM the following morning, for barrier installation, the Pennsylvania Department of Transportation (PennDOT) announced today.

During the overnight closure, motorists will be directed to exit at Route 100 North (Pottstown Pike) and follow Route 100 North (Pottstown Pike) and High Street/Benjamin Franklin Highway to access westbound U.S. 422.

In addition to the overnight closure, the temporary ramp from westbound U.S. 422 to the Stowe Interchange will be closed indefinitely beginning at 9:00 PM Thursday, December 21.

The temporary ramp, located about a quarter-mile west of the existing interchange, opened to traffic on Wednesday, December 13, to provide westbound U.S 422 motorists access to the Stowe Interchange while the new ramp was being built. However, a change in the maintenance and protection of traffic plan will force the interim ramp to close to traffic. Through fall 2019, westbound U.S. 422 motorists wanting access to the Stowe Interchange will be directed to exit at Route 100 North (Pottstown Pike) and follow Route 100 North (Pottstown Pike) and High Street/Benjamin Franklin Highway.

Drivers are advised to allow extra time when traveling on Route 100 North (Pottstown Pike) near the work area because backups and delays will occur.

The ramp from Grosstown Road at the Stowe Interchange to westbound U.S. 422 will also remain closed and detoured through fall 2019. Grosstown Road motorists are being directed to take High Street/Benjamin Franklin Highway to access westbound U.S. 422.

The work at the Stowe Interchange is part of a major improvement project to reconstruct 1.2 miles of U.S. 422 from just east of the Schuylkill River bridge to just west of the Montgomery County line.

Under this improvement project, PennDOT is reconstructing U.S. 422 on both existing and new alignments; reconfiguring the U.S. 422/Stowe Interchange to a diamond configuration; removing and replacing the existing ramps and culverts; installing new Intelligent Transportation Systems (ITS) equipment, message boards, signing, pavement markings, lighting, concrete median barriers, median glare screens and guide rail; upgrading stormwater management facilities and pipes; and constructing and restoring wetlands.

H & K Group, Inc. of Schwenksville, Montgomery County, is the general contractor on the $35,581,408 improvement project which is financed with 100 percent state funds from Act 89, Pennsylvania’s Transportation Plan. The entire project is scheduled to be completed in late 2020.

For more information on the project, visit

For more information on projects occurring or being bid this year, those made possible by or accelerated by Act 89, or those on the department’s Four and Twelve Year Plans, visit

A list of weekly road restrictions and PennDOT maintenance operations in the five-county Philadelphia region is available by visiting the District 6 Traffic Bulletin at   

Motorists can check conditions on more than 40,000 roadway miles, including color-coded winter conditions on 2,900 miles, by visiting 511PA, which is free and available 24 hours a day, provides traffic delay warnings, weather forecasts, traffic speed information, and access to more than 850 traffic cameras.

511PA is also available through a smartphone application for iPhone and Android devices, by calling 5-1-1, or by following regional twitter alerts accessible on the 511PA website.

For more PennDOT information, visit Follow local PennDOT information on Twitter at, and follow the department on Facebook at and Instagram at

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