22nd Street station was opened October 15, 1955 by the Philadelphia Transportation Company, built to replace the elevated 24th Street station that was opened in 1905 by the Philadelphia Rapid Transit Company and for the first two years formed part of a subway–surface trolley loop operating underground between and the Schuylkill River. In 1907, the Philadelphia Rapid Transit Company completed the Market Street subway–elevated line from to. It featured a bridge – located north of Market Street and south of Filbert Street – that carried both the subway and subway–surface lines over the Schuylkill River. The PRT bridge connected surface trolley lines in West Philadelphia to the underground subway–surface loop in Center City. The station at 24th Street was constructed of wood and built atop an embankment. It was the only subway–surface station not physically underground and was located one block the Baltimore & Ohio Railroad Station, which served B&O tracks running north-south along the east bank of the Schuylkill. The PRT announced a project to bury the elevated tracks between 23rd to 46th streets in the 1920s. The tunnel from 23rd to 32nd streets was completed by 1933, but construction on the remaining segment was put on hiatus due to the Great Depression and World War II. The PRT went bankrupt in 1939, and was reorganized as the PTC, which began building the rest of the tunnel in 1947. The tunnel opened for service on October 15 1955, marking the closure of the eastbound elevated station and the opening of the current underground station. The following month, on November 6, the westbound side elevated station closed. The PRT bridge that formerly had carried subway cars and subway–surface trolleys over the river was torn down by June 20, 1956. Nothing remains of the 24th Street station; the site is now the PECO Building and serves as the energy company's headquarters. The station originally served Routes 10, 11, 31, 34, 37 and 38. Route 31 was rerouted out of the tunnel in 1949 and buses replaced trolleys on routes 37 and 38 in 1955. Routes 13 and 36 began serving the station in 1956.
Modernization
Turnstiles were constructed on the westbound platform for all-door boarding in the SEPTA Keyfare collection system. As such, fares are paid prior to system entry and no fares are collected on trolleys outbound from Center City, but still must be paid at the trolley farebox inbound to Center City.
Station layout
The station has two low-level side platforms, each capable of platforming two trolleys. )