Sarmiento Line

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Sarmiento Line
Trenes arg operac logo.png
Csr rc06 00.jpeg
A CSR electric multiple unit that runs the line.
Service type Commuter rail
Status Active
Locale Buenos Aires Province
Predecessor BA Western Railway
First service 1948; 70 years ago (1948)
Current operator(s) SOFSE
Former operator(s) TBA
Ridership 39,664,000 (2014)[1]
Website Sarmiento Line
Start Once
Stops 40
End Moreno
Distance travelled 174 km
Average journey time
Service frequency
Rolling stock CSR EMUs
Track gauge 1,676 mm (5 ft 6 in)
Electrification Third rail
800 V (DC)
Track owner(s) Government of Argentina

The Sarmiento line is a broad gauge commuter rail service in Buenos Aires Province, Argentina, run by the state-owned Trenes Argentinos since 11 Sep 2013.[2]


In 2014 the Toshiba rolling stock (foreground) was replaced by CSR EMUs (background).

This line had previously been run by the state-owned company Ferrocarriles Argentinos since nationalisation of the Argentine railways in 1948. FA operated the trains until 1991 when residual company FEMESA temporarily took over all the urban services prior to be privatized. After the Government of Carlos Menem privatized the urban railways services private company Trenes de Buenos Aires (TBA) took over Mitre Line.

TBA operated the line until the 2012 Once station rail disaster happened. As a result, the National Government revoked the concession granted to TBA and gave the Mitre and Sarmiento to UGOMS, that operated the line until 2014 when it was re-privatised and given under concession to "Corredores Ferroviarios S.A."[3][4][5]

In 2014 the Government announced the acquisition of new trains to replace the existing Sarmiento Line rolling stock. The cars were manufactured by Chinese company CSR Corporation Limited, with the first arriving in June 2014.[6][7] The incorporation of the rolling stock was also accompanied by the replacement of rails between Once and Moreno.[8]

During 2015 a series of improvement works were conducted and completed on the line. These included remodelling stations, new signaling and other infrastructure improvements such as replacing track and third rail segments, as well as the refurbishing of workshops.[9] The works, which also included the installation of a communications-based train control system, meant that the line was closed on Sundays from February to June of that year on its electrified segment, with replacement bus services operating during that time.[8]


Puerto Madero station is currently disused and the line's services now terminate only at Once

The line has two underground segments not currently in use for passenger services. The first of these is an underground station within the Plaza Miserere Buenos Aires Underground station, which formerly provided a direct connection with Line A alongside its platforms, rather than passengers transferring from Once railway station to the line using underground passages. In May 2014, this connection was being restored with tracks replaced in order to restore the line's service to the Underground.[10]

The second is a tunnel which runs directly from Once railway station to Puerto Madero in the centre of the city. Today[when?] this is only used for freight to the Port of Buenos Aires, however it was briefly used for passenger services in the 1990s.[11] The tunnel is around 5 km long and runs through the middle of the city below Line A. Construction of the tunnel had been initiated by the Buenos Aires Western Railway in 1912, however it was not completed until 1916 due to delays caused by the First World War.[12] The restoration of this tunnel is currently[when?] under way according to SOFSE, however it is unclear if it will be used for passenger services or continued to be used for freight.[13]

Sarmiento tunnelling[edit]

The performance of the Sarmiento line will be greatly improved by drilling a new tunnel. Under plans announced in 2006, a 33 km tunnel is to be bored between Moreno and Caballito in order to replace the surface alignment of the Sarmiento commuter route. According to the Minister of the Interior and Transport, the first stage will cost 11.5 billion pesos, removing many level crossings which would "avoid many accidents and much loss of life." The new underground alignment should increase the service frequency to every 3 min, increasing capacity from 100 million to 280 million passenger-journeys a year. The tunnel segment will have 13 underground stations. Drilling started 2 July 2012. During the construction, service on the surface line will continue.[14]

Train services[edit]

Start End Time Type
Once Moreno 72 min Electric
Moreno Mercedes 90 min Diesel
Merlo Lobos 130 min



See also[edit]


  1. ^ a b Once-Moreno
  2. ^ a b Merlo-Lobos
  3. ^ a b Moreno-Mercedes


  1. ^ "Estadísticas del transporte ferroviario - Total 2014". CNRT. Ministry of Transport. Archived from the original on 2015-06-12.
  2. ^ "El gobierno nacional estatizó los ferrocarriles Sarmiento y Mitre". Infobae. 11 September 2012.
  3. ^ "Trenes: le dan a Roggio el Mitre y el San Martín y a Emepa, el Roca y el Belgrano Sur". La Nación. 12 February 2014.
  4. ^ "Las privadas volverán a operar la mayoría de las líneas ferroviarias". Clarín. 12 February 2014.
  5. ^ "El Gobierno estableció un nuevo régimen de operaciones de las líneas ferroviarias". Telam. 12 February 2014.
  6. ^ "CSR fleet enters service in Buenos Aires". Railway Gazette International. 10 June 2013.
  7. ^ "Ya está en viaje la primera de las 25 formaciones para la línea Sarmiento". Telam. 7 January 2014.
  8. ^ a b "El tren Sarmiento no prestará servicio los domingos por obras durante 90 días". Telam. 22 February 2015.
  9. ^ "El Sarmiento Vuelve a Operar los Domingos". InfoNews. 20 June 2015.
  10. ^ "Sarmiento: renovación de vías en Plaza Miserere". Taringa. 27 May 2014.
  11. ^ "Desde Puerto Madero a Castelar en 20 minutos". La Nacion. 8 August 1997.
  12. ^ "Un nuevo tren irá por un viejo túnel". Clarin. 28 July 1997.
  13. ^ "Obras en Ejecucion" (PDF). SOFSE.
  14. ^ "Ceremony marks start of Sarmiento tunnelling". Railway Gazette. 2012. Retrieved 2012-07-05.
  15. ^ "Horarios y tarifas Línea Sarmiento". SOFSE.

External links[edit]