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Potomac River Highway Bridge
A mile downstream from Williamsport, Md., Interstate 81 crosses the Potomac. The road carries a large number of trucks on a popular north-south route. The road generally follows the old route of U.S. 11 from New York State to Tennessee along the Appalachian Mountains.
Nearby Potomac River Crossings
To view all Potomac River crossings, select this link.