Pennsylvania Route 340

Pennsylvania Route 340
Route information
Maintained by PennDOT
Length	30.064 mi[1] (48.383 km)
Major junctions
West end	PA 462 near Lancaster
Major intersections	US 30 near Lancaster PA 896 in Smoketown PA 772 in Intercourse PA 897 in White Horse PA 10 in Compass PA 82 near Coatesville US 30 near Thorndale
East end	US 30 Bus. in Thorndale
Location
Country	United States
State	Pennsylvania
Counties	Lancaster, Chester
Highway system
Pennsylvania State Route System Interstate US State Scenic Legislative
← PA 339 → PA 341

Pennsylvania Route 340 (PA 340) is a 30-mile-long (48 km) state highway located in Lancaster and Chester counties in Pennsylvania. The western terminus is at PA 462 in Lancaster. The eastern terminus is at U.S. Route 30 Business (US 30 Bus.) in Thorndale. The route is a two-lane road passing through rural areas, heading through the Pennsylvania Dutch Country in eastern Lancaster County that is home to several Amish families and rural areas in western Chester County, serving the communities of Bird-in-Hand, Intercourse, White Horse, Compass, and Wagontown. PA 340 intersects US 30 near Lancaster, PA 772 in Intercourse, PA 897 in White Horse, PA 10 in Compass, PA 82 near Coatesville, and US 30 again near Thorndale.

The route follows the route of the King's Highway that linked Lancaster and Philadelphia in colonial times and is, in fact, named King's Highway during the first few miles of its length near Thorndale. PA 340 was first designated in 1928 between US 222/PA 240 east of Lancaster and US 30/PA 1 in Gap, following its current route to White Horse before turning south to Gap. In 1937, the route was extended east to US 30 in Coatesville by heading east along its current route to Wagontown and turning south to Coatesville, with PA 897 replacing the former route between White Horse and Gap. By 1940, the route was extended west to US 22 in Harrisburg, heading west to Marietta, north to Hershey, northwest to Union Deposit, and west to Harrisburg. PA 340 was rerouted to end at US 30 in Thorndale during the 1940s. In the 1950s, the west end was cut back to US 422 in Hershey. The western terminus was scaled back to PA 441 in Marietta by 1962 and its current location by 1970, with the former alignment now PA 743 between Hershey and Marietta and PA 23 between Marietta and Lancaster.