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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

Expect Delays: Pothole Repairs Hit U.S. 1, 30, 202

February 28, 2026February 27, 2026 - by Alec Robson

CHESTER COUNTY, PA — Drivers across Chester County should prepare for periodic daytime lane closures and slowdowns next week as PennDOT crews repair deteriorating pavement on several major state highways.

Expect Delays: Pothole Repairs Hit U.S. 1, 30, 202 Read More

Traffic
Traffic

Pothole Blitz Hits Philly Region Highways Next Week

February 20, 2026February 20, 2026 - by Alec Robson

Drivers across the five-county area should brace for rolling slowdowns next week as PennDOT crews launch a widespread pothole repair effort on more than 30 state highways.

Pothole Blitz Hits Philly Region Highways Next Week Read More
Pothole repair
Traffic

Chester County State Highways: Pothole Repairs Set Next Week

February 14, 2026February 14, 2026 - by Alec Robson

At A Glance Roads Affected: U.S. 1, U.S. 30, U.S. 202, Route 23, Route 41, Route 100, Route 724, Old Baltimore Pike Dates: Week of February 16 Times: Daytime hours …

Chester County State Highways: Pothole Repairs Set Next Week Read More

Pothole repair
Traffic

Pothole Patrol Targets Chester County Roads as PennDOT Ramps Up Repairs

February 6, 2026February 6, 2026 - by Alec Robson

CHESTER COUNTY, PA — PennDOT crews will fan out across Chester County next week as part of a sweeping effort to repair potholes on dozens of state highways battered by …

Pothole Patrol Targets Chester County Roads as PennDOT Ramps Up Repairs Read More
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

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