High Quality Content by WIKIPEDIA articles! Wallingford is a railway station along the SEPTA R3 line, the former Pennsylvania Railroad West Chester Line. It is located at Kershaw Road and Possum Hollow Road (although SEPTA gives the address as "Kershaw Avenue"), Wallingford, Pennsylvania.In 1855, when the rail line was extended (to Media) through Wallingford, passing and freight sidings were built at the location. The present station was built in 1890 (although some sources claim it was built in 1880) and designed by architect Frank Furness. For a time, this station also served as Wallinford's post office.