Ferrosur Roca S.A. (FR) is a private company which, in December1992, was awarded a concession, granted by the Argentine government, for the operation of freight services over part of the 5 ft 6 in (1,676 mm) broad gauge rail network built by the British-owned company Buenos Aires Great Southern Railway and run by the state-owned Ferrocarril General Roca since the nationalisation of the railways in 1948.
The company is 80% owned by the Cofesur group, 16% State-owned and 4% owned by employees of the company through Personal de Ferrosur S.A.. Freight services began on 11 March 1993 over a 3,342 km (2,077 mi) rail network extending south and southwest from Buenos Aires through the provinces of Buenos Aires, Rio Negro and Neuquén and serving the ports of Bahía Blanca, Quequén and San Antonio Oeste. The branch from Bahia Blanca to Zapala serves the commercially important Rio Negro fruit-growing region.
FR was 2,550 wagons, 31 mainline locomotives and 15 shunters and their rail network has points of connection with other freight services operated by Ferroexpreso Pampeano, Nuevo Central Argentino and América Latina Logística.