Stalled Tunnel, 1932–1948

Construction of the Market Street rapid transit/subway tunnel began around 1923 at 24th Street. By 1932 the four-lane tunnel under the Schuylkill River had only reached 32nd Street, at which point construction was halted and the tunnel sealed. The Great Depression and Second World War provided ample reasons for postponing the project. Construction began anew in 1948.