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Through Pennsylvania, US 202 serves as a bypass of the Philadelphia metro area along its mix of at-grade and limited-access roadways. A long-abandoned plan would have made the 202 corridor a true "bypass"...
Highlights: Brandywine Battlefield Historic Site, PA/DE State Line
For Historic Overview of all Existing and Unbuilt Sections in Pennsylvania: http://www.phillyroads.com/roads/US-202_PA/