The General Roca Railway (FCGR) is a 5 ft 6 in broad gauge railway in Argentina which runs from Constitución station in Buenos Aires to the south of the country through the provinces of Buenos Aires, La Pampa, Neuquén and Río Negro. It was also one of the six state-owned Argentine railway divisions formed after President Juan Perón's nationalisation of the railway network in 1948, being named after former president Julio Argentino Roca. The six companies were managed by Ferrocarriles Argentinos which was later broken up during the process of railway privatisation beginning in 1991 during Carlos Menem's presidency.

Constitución railway station is a large railway station in Constitución, a barrio in central Buenos Aires, Argentina. The full official name of the station is Estación Plaza Constitution reflecting the fact that the station is located opposite Constitution Square, two kilometers to the south of the Obelisco landmark. The ground floor of the station has fourteen tracks and the floor below has two tracks for the Buenos Aires Underground.