end of the tracks at GCT. The Hudson Line did not serve the stations in the Park Avenue tunnel. Bibliography References External links world.nycsubway.org – Hudson Line Hudson Line Schedules Route on OpenStreetMap NYC Hudson Division - Troy to Oscawana and Croton North to GCT (Road and Rail Pictures) Penn Central Railroad: Hudson, Harlem and other nearby Divisions; April 28, 1968 Metro-North Railroad New York Central Railroad lines Hudson River Rail infrastructure in New York (state)