In 1926, when the U.S. Numbered Highway System was established,[REF] each designated trail in the United States was given a number and the majority of the Bethlehem Pike was signed as U.S. Route 309 (US 309) [REF].
North of Philadelphia, US 309 was designated on the newly built Fort Washington Expressway, east of the original alignment on the Bethlehem Pike [REF].