Lake Shore Drive, Main Street, Blandon Avenue, Philadelphia Avenue, Big Road, Gravel Pike, Skippack Pike, Bethlehem Pike, Church Road, Washington Lane, Township Line Road, Cottman Avenue, State Road, New State Road, Elbridge Street, Tacony-Palmyra Bridge

Western Terminus:
Pottsville Pike (PA 61) in Leesport
Eastern Terminus:
New Jersey-Pennsylvania state line
60.08 miles
Berks, Montgomery, Philadelphia

PA 73 is a diagonal route through Philadelphia and its suburbs and exurbs. It begins at Pottsville Pike (PA 61) in Leesport and runs southeast toward Philadelphia. It crosses the city on Cottman Avenue and then follows State Road and New State Road to the Tacony-Palmyra Bridge, which crosses the Delaware River to New Jersey. It becomes NJ 73 at the state line.

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