 PA 73 was realigned to its current routing to Tacony–Palmyra Bridge in the 1960s, having previously followed Frankford Avenue and Robbins and Levick streets on a one-way pair.PA 73 begins at an intersection with PA 61 in Ontelaunee Township, Berks County to the north of the city of Reading and to the southeast of the borough of Leesport.From this intersection, the route heads northeast on two-lane undivided Lake Shore Drive past a mix of farm fields and development, passing south of Schuylkill Valley High School.