PA 642 Travel Info
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Pennsylvania Route 642 (PA 642) is an 21.4-mile (34.4 km) long state highway located in Union, Northumberland, Montour, and Columbia counties in Pennsylvania. The western terminus is at US 15 in Kelly Township. The eastern terminus is at PA 254 in Madison Township.
PA 642 begins at an interchange with the US 15 freeway in the community of West Milton in ... more
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