In 1946, the northern terminus was moved to US 309 in Sellersville, replacing the segment of PA 413. From the late 1940s to before 1960, the southernmost segment on Easton Road from US 309 to Arcadia University was signed as US 611 Alternate. By 1960, the southern terminus was moved to its current location at US 309 (now PA 309) in Cheltenham Township, with US 309 replacing the route along Stenton Avenue and Ogontz Avenue. The northern terminus was moved to its current location at the PA 309 interchange near Sellersville by 1970.