34th Street–Penn Station is a station on the IND Eighth Avenue Line of the New York City Subway, located at the intersection of 34th Street and Eighth Avenue in Manhattan, and adjacent to Pennsylvania Station. It is served by the A and E trains at all times, and the C train at all times except late nights. Pennsylvania Station is a major transfer point to Amtrak, New Jersey Transit and the Long Island Rail Road. It is the busiest railroad station in the United States.