The Atlantic City Line (ACL) is a rail line operated by New Jersey Transit (NJT) in the United States between Philadelphia, Pennsylvania and Atlantic City, New Jersey, operating along the corridor of the White Horse Pike. It runs over trackage that was controlled by both the Pennsylvania Railroad (PRR) and the Pennsylvania-Reading Seashore Lines. It shares trackage with SEPTA and Amtrak on the Northeast Corridor (NEC) until it crosses the Delaware River on its own Delair Bridge into New Jersey.