U.S. Route 40 in Pennsylvania

U.S. Route 40
National Road
US 40 highlighted in red and business routes in blue
Route information
Maintained by PennDOT
Length	82.5 mi[1] (132.8 km)
Tourist routes	Historic National Road
Major junctions
West end	US 40 near Valley Grove, WV
Major intersections	I-70 in Washington US 19 in Washington I-79 near Washington PA Turnpike 43 near West Brownsville US 119 / PA 43 / US 40 Bus. in Uniontown
East end	US 40 near Grantsville, MD
Location
Country	United States
State	Pennsylvania
Counties	Washington, Fayette, Somerset
Highway system
United States Numbered Highway System List Special Divided Pennsylvania State Route System Interstate US State Scenic Legislative
← PA 39 → PA 41
← US 11 PA 11 → PA 12 ← I-81 PA 81 → I-81E

U.S. Route 40 (US 40) enters Pennsylvania at West Alexander. It closely parallels Interstate 70 (I-70) from West Virginia until it reaches Washington, where it follows Jefferson Avenue and Maiden Street. In Washington, US 40 passes to the south of Washington & Jefferson College. Following Maiden Street out of town, the road turns southeast toward the town of California. A short, limited-access highway in California and West Brownsville provides an approach to the Lane Bane Bridge across the Monongahela River. From here, the road continues southeast to Uniontown.

US 40 bypasses Uniontown along a freeway that also carries US 119. An old alignment through Uniontown is signed as US 40 Business. Southeast of Uniontown, travellers pass the Fort Necessity National Battlefield. It follows Braddock Road southeast of Uniontown, crossing the Youghiogheny River Lake on a bridge completed in 2006. US 40 leaves Pennsylvania at Addison.