On August 29, 1972, a swap of I-76 and I-676 in Philadelphia and Camden was approved. I-76 had been routed along the Vine Street Expressway and Ben Franklin Bridge (now I-676) through Downtown Philadelphia, while I-676 used the Schuylkill Expressway and Walt Whitman Bridge to bypass downtown to the south. The switch was made because of delays in building the Vine Street Expressway, better interchange geometry at the splits, and that the Ben Franklin Bridge ends in city streets, rather than in expressway grade.