 in Reading with most of the remainder between Reading and Oley becoming unnumbered except along the concurrencies with US 222 and US 422 Bus.In the 1960s, PA 73 was rerouted at US 13 (Frankford Avenue) to follow Cottman Avenue, the one-way pair of Princeton Avenue eastbound and Cottman Avenue westbound past Torresdale Avenue, State Road, and New State Road to the Tacony–Palmyra Bridge.On November 24, 1998, an act of the Pennsylvania General Assembly designated the portion of PA 73 between North Wales Road and Butler Pike in Whitpain Township as the POW/MIA Memorial Highway in honor of soldiers who are prisoner of war (POW) or missing in action (MIA).