Ferrocarril General Roca

Ferrocarril General Roca (FCCR), named after the former Argentine president Julio Argentino Roca, was one of the six state-owned Argentine railway companies formed after President Juan Perón's nationalisation of the railway network in 1948. 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.

FCCR incorporated the British-owned Buenos Aires Great Southern Railway, the southern section of the French-owned Ferrocarril Rosario y Puerto Belgrano and Ferrocarriles del Estado, including the Central of Chubut Railway which had been nationalised in 1920 and Ferrocarriles Patagónicos.

The principal lines departed from Estación Constitución in Buenos Aires to the south through the provinces of Buenos Aires, La Pampa, Neuquen and Rio Negro.

Track gauge RailGauge|66|lk=on Broad gauge

uburban branch

In the metropolitan sector of the City of Buenos Aires the Línea Roca operates from the city-centre terminus of Estación Constitución south to Alejandro Korn, Cañuelas, and La Plata, and west to Haedo.