Route information | ||||
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Maintained by PennDOT | ||||
Length | 2.20 mi[1] (3.54 km) | |||
Existed | 1961–present | |||
Major junctions | ||||
West end | PA 38 / PA 208 near Emlenton | |||
I-80 near Emlenton | ||||
East end | PA 58 in St. Petersburg | |||
Location | ||||
Country | United States | |||
State | Pennsylvania | |||
Counties | Clarion, Venango | |||
Highway system | ||||
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Pennsylvania Route 478 (PA 478) is a 2.20-mile-long (3.54 km) state highway located in Clarion and Venango counties. The highway begins at an intersection with PA 38 and PA 208 northeast of Emlenton. The highway serves the eastbound interchange for Exit 45 on Interstate 80 (I-80) and terminates at PA 58 in St. Petersburg.
The alignment of PA 478 began as part of the former alignment of PA 238 until 1936, when PA 378 was designated on the alignment. In 1961, to avoid duplication with the newly numbered I-378 in Bethlehem, the route was redesignated as PA 478.