The PATCO Speedline (signed in Philadelphia as the Lindenwold Line and also known colloquially as the PATCO High Speed Line) is a rapid transit route operated by the Port Authority Transit Corporation (PATCO), which runs between Philadelphia, Pennsylvania and Camden County, New Jersey. The line runs underground in Philadelphia, crosses the Delaware River on the Benjamin Franklin Bridge, runs underground in Camden, then runs above ground to the east end of the line in Lindenwold, New Jersey. The Port Authority Transit Corporation and the Speedline are owned and operated by the Delaware River Port Authority. The line opened between Lindenwold and Camden on January 4, 1969 with the full line to Philadelphia opening a few weeks later on February 15, 1969. The PATCO Speedline operates 24 hours a day, one of only a few U.S. mass transit systems to do so. In 2021, the line saw 3,683,100 rides, or about 16,200 per weekday in the third quarter of 2022.