From June, 1978 until August, 1979, SEPTA extended some of its Bethlehem trains to Allentown. In order to get to Allentown, the RDC's would complete their Bethlehem station stop, pull across the Lehigh River on the ex-Reading bridge, back over the connection to the former LV main, and proceed west to Allentown. Here, a pair of RDC's have completed the reverse move, and are starting toward Allentown. Not the Lehigh Valley pickup on the left.
