The PATCO Speedline, signed as the Lindenwold Line in Philadelphia and commonly referred to as the PATCO High Speed Line, is a rapid transit route operated by the Port Authority Transit Corporation (PATCO), connecting Philadelphia, Pennsylvania, with Lindenwold in Camden County, New Jersey.
The line runs underground in Philadelphia, crosses the Delaware River on the Benjamin Franklin Bridge, continues underground through Downtown Camden, and then operates predominantly at grade or on elevated track between Camden and Lindenwold. Both PATCO and the Speedline are owned and operated by the Delaware River Port Authority. Service began on January 4, 1969, between Lindenwold and Camden, with full service to Philadelphia commencing on February 15, 1969. The Speedline integrates the historic Bridge Line, originally opened in 1936 between Philadelphia and Broadway Station in Camden, with newly constructed infrastructure along a former commuter rail corridor between Camden and Lindenwold.