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Pennsylvania Route 100

Pennsylvania Route 100 is a 59.4-mile (95.6 km) long state highway in the U.S. state of Pennsylvania that runs from U.S. Route 202 (US 202) near West Chester north to PA 309 in Pleasant Corners. The route runs between the western suburbs of Philadelphia and the Lehigh Valley region of the state, serving Chester, Montgomery, Berks, and Lehigh counties. PA 100 intersects several important highways including US 30 in Exton, the Pennsylvania Turnpike (Interstate 76, I-76) near Lionville, US 422 near Pottstown, US 222 in Trexlertown, and I-78/US 22 in Fogelsville. PA 100 has several sections which are a multi-lane divided highway with some interchanges, including between US 202 and the Pennsylvania Turnpike in Chester County, between south of Pottstown and New Berlinville, and between Trexlertown and Fogelsville.

Traffic alert, expect delays
Traffic

Route 100 Bottleneck Ahead as Inlet Repairs Trigger Weeklong Lane Closures

December 14, 2025December 13, 2025 - by Alec Robson

UPPER UWCHLAN TWP, PA — Motorists traveling through northern Chester County should prepare for daytime slowdowns next week as PennDOT schedules inlet repair work along a busy stretch of Route …

Route 100 Bottleneck Ahead as Inlet Repairs Trigger Weeklong Lane Closures Read More

Road Closure
Traffic

Long-Term Closure Planned for St. Peters Road in Warwick Twp

October 5, 2025October 4, 2025 - by Alec Robson

WARWICK TWP, PA — The Pennsylvania Department of Transportation (PennDOT) announced that northbound St. Peters Road in St. Peters Village will close Monday, October 20, for retaining wall construction to …

Long-Term Closure Planned for St. Peters Road in Warwick Twp Read More
Road Closure
Traffic

Fairview Road Closure Scheduled for Pipe Replacement in Chester County

July 26, 2025July 26, 2025 - by Alec Robson

EAST NANTMEAL TWP, PA — The Pennsylvania Department of Transportation (PennDOT) has announced a scheduled closure of Fairview Road in East Nantmeal Township, Chester County, to facilitate pipe replacement work.

Fairview Road Closure Scheduled for Pipe Replacement in Chester County Read More

Traffic, flagging
Traffic

Water Main Construction to Close Whitford Road in Chester County

May 23, 2025May 23, 2025 - by Alec Robson

CHESTER COUNTY, PA — The Pennsylvania Department of Transportation (PennDOT) has announced that Aqua Pennsylvania will begin water main construction on Whitford Road in Uwchlan and West Whiteland townships on …

Water Main Construction to Close Whitford Road in Chester County Read More
Road work
Traffic

Chester County Drivers Beware: PennDOT Targets Potholes in Major Repair Effort

March 30, 2025March 30, 2025 - by Alec Robson

CHESTER COUNTY, PA — The Pennsylvania Department of Transportation (PennDOT) has commenced pavement repair operations throughout Chester County to address the impacts of this season’s rapid freeze-thaw cycles, known to …

Chester County Drivers Beware: PennDOT Targets Potholes in Major Repair Effort Read More

Pothole repair
Traffic

Pothole Repairs Scheduled on Chester County Roads Next Week

March 15, 2025March 15, 2025 - by Alec Robson

CHESTER COUNTY, PA — The Pennsylvania Department of Transportation (PennDOT) has announced that maintenance crews will conduct pothole repairs next week on multiple state highways in Chester County. Motorists are …

Pothole Repairs Scheduled on Chester County Roads Next Week Read More
Pothole repair
Traffic

PennDOT Schedules Road Repairs in Chester County

March 9, 2025March 9, 2025 - by Alec Robson

CHESTER COUNTY, PA —The Pennsylvania Department of Transportation (PennDOT) announced its maintenance crews will address deteriorating pavement conditions across Chester County, as part of efforts to manage the challenges posed …

PennDOT Schedules Road Repairs in Chester County Read More

Traffic, lane closed
Traffic

Construction Scheduled for U.S. 422 and Route 100 as Part of $83.6M Reconstruction Project

February 28, 2025February 28, 2025 - by Alec Robson

LOWER POTTSGROVE TWP, PA — The Pennsylvania Department of Transportation (PennDOT) has announced construction activities next week on U.S. 422 and Route 100 in North Coventry Township, Chester County. The …

Construction Scheduled for U.S. 422 and Route 100 as Part of $83.6M Reconstruction Project Read More
Travel Restrictions
Regional

Roadwork Scheduled on U.S. 422, Route 100, and Route 724 in Montgomery County

February 21, 2025February 21, 2025 - by Alec Robson

LOWER POTTSGROVE TOWNSHIP, PA — The Pennsylvania Department of Transportation (PennDOT) has announced upcoming roadwork next week as part of an $83.6 million reconstruction project on U.S. 422 and nearby …

Roadwork Scheduled on U.S. 422, Route 100, and Route 724 in Montgomery County Read More
Traffic Alert
Traffic

Route 100 Bridge Overhaul to Bring Overnight Closures to U.S. 322—Here’s What You Need to Know

November 30, 2024November 30, 2024 - by Alec Robson

WEST GOSHEN TWP, PA — The Pennsylvania Department of Transportation (PennDOT) has announced a superstructure replacement project for the Route 100 (Pottstown Pike) bridge over U.S. 322 (West Chester Bypass) in …

Route 100 Bridge Overhaul to Bring Overnight Closures to U.S. 322—Here’s What You Need to Know Read More

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