Finally on March 1, 1948, all the foreign railway companies in Argentina were nationalised under the Juan Perón's administration, creating the State-owned company "Empresa de Ferrocarriles del Estado Argentino (EFEA)", then renamed to Ferrocarriles Argentinos, taking over all the railway lines of Argentina, including passenger and freight services.Since the branch felt into disuse, the railway buildings and lands behind the tracks were illegally usurped by homeless families, while on the other hand, groups of neighbors claimed for the re-establishing of the services.Between 1985 and 1985 Ferrocarriles Argentinos (that run all the urban services by then) signed agreements with different Municipalities of Greater Buenos Aires to build more tunnels to replace the level crossings existing in those districts.Some of the works made that contributed to the success of the Express included 357 km of new rail tracks in Santiago del Estero Province and José León Suárez in Greater Buenos Aires, reparating and maintenance of rolling stock in Rosario workshops, remodelation of Hitachi coaches in Junín workshops, brand new Fiat-Concord coaches acquired, remodelling of stations, level crossings, bridges, signalling, construction of new platforms, installation of a luggage belts in Retiro, electronic signs in the main stations of the line (Retiro, Tucumán, Rosario, La Banda) indicating departures and arrivals of the trains and the opening of new ticket booths.Tren de la Costa S.A., a company of local Sociedad Comercial del Plata, owned by Santiago Soldati, won the tender and began the works to reactivate the branch.Mitre branch, the new Maipú-Delta service was a light rail system, using two-car train sets acquired to Spanish company Construcciones y Auxiliar de Ferrocarriles (CAF).During the first years of existence, the branch carried an average of 100,000 passenger (on weekends) due to it had been conceived as a tourist train, with Maipú, Libertador and San Isidro as its main commercial centres.After a progressive decrease of the number of passengers carried and the closure of most of shops in the stations,[5] The Government of Argentina revoked the concession to SCP, taking over the Tren de la Costa through its subsidiary SOFSE.This coaches were built by local factory Emprendimientos Ferroviarios S.A. (EMFER) and featured air conditioning, ABS brakes and computer-supervising systems.The future investments required to acquire 492 brand-new electric coaches, refurbishing of more than 100 km of existing tracks, and the installation of new signalling, among other improvements.Through National Decree N° 520/91 the Government of Argentina created residual company FEMESA to run the urban passenger services in Buenos Aires.Finally, in April 2002 the government awarded private company Nuevo Central Argentino (NCA), formed by local companies Aceitera General Deheza, Banco Francés del Río de la Plata, Asociación de Cooperativas Argentinas and Román Marítima, the operation and mainteaneance of Ferrocarril Mitre.NCA began operating on December 23, 1992, run trains through Buenos Aires, Córdoba, Santa Fe, Santiago del Estero and Tucumán provinces, with a total of 4,512 km.