Suburban Station is an art deco office building and underground commuter rail station in Penn Center in Philadelphia. Its official SEPTA address is 16th Street and JFK Boulevard. The station is owned and operated by SEPTA and is one of the three core Center City stations on the SEPTA Regional Rail and one of the busiest stations in the Regional Rail System. The station, which was built by the Pennsylvania Railroad to replace the original Broad Street Station, opened on September 28, 1930. History The station opened as a stub-end terminal for Pennsylvania Railroad suburban commuter trains serving Center City Philadelphia, intended to replace the above-ground Broad Street Station in this function. PRR inter-city trains, on the other hand, would use Thirtieth Street Station. The station's full name was originally Broad Street Suburban Station. It also includes a 21-story office tower, One Penn Center, which served as the headquarters of the PRR from 1930 to 1957. When Amtrak took over the Silverliner Service from Penn Central in 1972, it was operated as a quasi-commuter service (Clockers and express trains to New York) that terminated at Suburban Station. The trains through Harrisburg were named Keystone Service in 1981. By the late 1980s, the Metroliners used for the service were in poor shape, but Amtrak had a shortage of AEM-7 locomotives due to wrecks. On February 1, 1988, Amtrak converted all Keystone Service trains to diesel power and terminated them on the lower level of 30th Street Station, as diesel-powered trains were not allowed in the tunnels to Suburban Station. The change was listed as "temporary" on timetables starting on May 15, 1988, and lasting into 1990. Suburban Station was originally a stub-end terminal station with eight tracks and four platforms. Plans for a tunnel to link the Pennsylvania and Reading commuter lines were floated as early as the 1950s, but funding to seriously study the project did not start until SEPTA's formation in the late 1960s. The project languished in the 1970s for want of funding until federal money was appropriated during Philadelphia mayor Frank Rizzo's time in office. SEPTA took over operation of all commuter rail service in the Philadelphia area in 1983; it had previously contracted their operations to Conrail from 1976 to 1983 and to PRR and Reading from 1966 to 1976. A train crash occurred here on December 10, 1986, when an Airport Line train rammed a