Trenes Argentinos Operaciones

Trenes Argentinos Operaciones is the trading name of Operadora Ferroviaria Sociedad del Estado, commonly abbreviated as SOFSE, an Argentine state-owned railway operating company. It is responsible for passenger train services across Argentina and functions within the Ferrocarriles Argentinos state railway structure. Its activities include Buenos Aires suburban commuter rail, intercity services linking the capital with provincial cities, and regional routes in several provinces. The company was created during a reorganization of Argentina's railway administration in 2008. Law 26.352 divided key railway responsibilities between two state entities: Administración de Infraestructuras Ferroviarias, responsible for railway infrastructure, and Operadora Ferroviaria, responsible for train operations. Decree 752/08 subsequently regulated the newly established operator. The creation of SOFSE followed a long period of railway privatization and concessioning that began in 1989, after which un-concessioned railway assets passed through several state property-administration bodies. SOFSE became operational in 2010 when it assumed services in Chaco Province that had previously been operated by Servicios Ferroviarios del Chaco. It expanded into regional operations in Salta and Buenos Aires Province in 2011. Following the creation of the Ministry of Transport in 2012, the company took responsibility for non-concessioned urban railway services in Greater Buenos Aires and began operating additional intercity routes, including services toward Córdoba and San Miguel de Tucumán and routes previously managed by the government of Entre Ríos Province. The operator's role increased substantially after the Argentine government withdrew or revoked several private railway concessions. In 2013, SOFSE assumed operation of Tren de la Costa after the state ended the concession held by Sociedad Comercial del Plata. It was also assigned the Mitre and Sarmiento lines after the concession held by Trenes de Buenos Aires was revoked, although Mitre was temporarily returned to private concession under Corredores Ferroviarios in 2014. In March 2015, the state cancelled the concessions for the Belgrano Sur, Roca, Mitre and San Martín lines and placed the services under SOFSE operation. This made the company a central operator of Buenos Aires commuter rail. The company also participated in the renewal and extension of long-distance passenger services. Chinese-built rolling stock entered service on routes including Buenos Aires–Mar del Plata, Buenos Aires–Rufino, and Buenos Aires–Córdoba. Service quality and journey times have been constrained by the condition of Argentina's railway infrastructure; the Buenos Aires–Córdoba journey, for example, was reported to take approximately 19.5 hours in 2015 for a route of about 700 kilometres. In 2023, the operator restored passenger railway service to Mendoza Province for the first time since the early 1990s, using Palmira as the terminus because the former Mendoza railway station had been incorporated into the local tramway network. SOFSE's network has also contracted in some areas. Services have been suspended or discontinued when the company or the government cited low demand, infrastructure deterioration, maintenance costs, flooding damage, bridge failures, accidents, or the need for track repairs. The company therefore combines a public-service mission with operational constraints typical of Argentina's fragmented and unevenly maintained railway system. Its principal role remains the operation of passenger services rather than ownership of all railway infrastructure or rolling stock.

Trenes Argentinos Operaciones, formally Operadora Ferroviaria Sociedad del Estado and commonly known as SOFSE, emerged from Argentina's attempt to reorganize passenger railway administration after decades of privatization and concessioning. Beginning in 1989, many railway services and assets were transferred to private operators, while assets that were not placed under concession passed through successive state bodies. Ferrocarriles Argentinos was dissolved, and from 1996 to 2000 the Ente Nacional de Administración de Bienes Ferroviarios administered remaining assets. In 2000, that body was merged into the Dirección Nacional de Bienes del Estado, after which the Organismo Nacional de Administración de Bienes managed railway property not directly assigned to state activities. Law 26.352, enacted in 2008, established a new institutional framework. It created Administración de Infraestructuras Ferroviarias to manage infrastructure and Operadora Ferroviaria to operate passenger railway services. Decree 752/08 provided the operating framework for the new company. Although SOFSE was legally created in 2008, it did not immediately operate a broad national network. Its first operational expansion occurred in 2010, when it took over passenger services in Chaco Province from Servicios Ferroviarios del Chaco. The operator expanded regionally in 2011 by adding services in Salta and Buenos Aires Province. A broader change followed in 2012, when the Ministry of Transport assigned SOFSE the non-concessioned urban services of Greater Buenos Aires. The company also began operating intercity routes, including services to Córdoba and San Miguel de Tucumán and routes that had previously been administered by the government of Entre Ríos Province. These developments shifted SOFSE from a limited state operator into a principal vehicle for direct public operation of passenger railways. In 2013, the state transferred operation of Tren de la Costa to SOFSE after revoking the concession held by Sociedad Comercial del Plata. That year, the government also assigned the Mitre and Sarmiento lines to SOFSE after cancelling Trenes de Buenos Aires' concessions. SOFSE's operation of Mitre was temporary: in February 2014, the line was placed under a new concession held by Corredores Ferroviarios, part of the Emepa Group. Rolling-stock renewal and route restoration were important elements of the company's subsequent development. In late 2014, new trains purchased from CNR Dalian in China entered service on the Buenos Aires–Mar del Plata route. In February 2015, passenger service between Buenos Aires and Rufino was restored after a 22-year interruption, also using new Chinese-built trains. In March 2015, SOFSE began operating Chinese CNR CKD8 trains on the Buenos Aires–Córdoba route. The service demonstrated the limitations imposed by infrastructure: the roughly 700-kilometre journey took around 19.5 hours, more than twice the travel time recorded for the route in 1938. A decisive institutional expansion occurred on 2 March 2015. The Argentine government rescinded the concessions for the Belgrano Sur, Roca, Mitre and San Martín commuter lines, previously operated by Argentren and Corredores Ferroviarios, and transferred them to SOFSE. The concession agreements allowed cancellation without compensation claims. Since then, these lines have formed the core of SOFSE's metropolitan passenger operation in Buenos Aires Province. The network has subsequently been adjusted in response to demand and infrastructure conditions. In January 2016, services between Santa Rosa and General Pico in La Pampa were stopped because of low demand and damage to bridges after flooding. In June of the same year, the Buenos Aires–Rosario service was extended to Rosario Norte, providing a terminus nearer to central Rosario. In March 2023, Trenes Argentinos announced the planned restoration of passenger service to Mendoza Province, interrupted since 1993. Because the former Mendoza station had become part of the Metrotranvía system, the service terminated at Palmira, approximately five kilometres from Mendoza. A trial run took place in March, and the route eventually reached Palmira in June after a delay. The long journey time, approximately 27 hours, attracted criticism in comparison with historical travel times. In subsequent years, some routes were suspended or closed. Reported reasons included low demand, increasing maintenance expenses, deteriorated infrastructure, bridge damage and the need for repairs following accidents or derailments. Among the affected services were Retiro–Justo Daract, Retiro–Palmira, Bragado–Pehuajó, General Guido–Pinamar and the Mercedes–Tomás Jofré tourist service. The latter became inactive after a truck destroyed a bridge in 2024 and the structure was not repaired. By late 2025, long-distance services toward Córdoba and San Miguel de Tucumán were reported as indefinitely suspended while track repairs continued after a September derailment. SOFSE therefore remains a major national passenger operator, but its effective network is shaped by the condition of Argentina's railway infrastructure, government policy and the financial and operational sustainability of individual routes.

• 2023

  Passenger service restored toward Mendoza

  [1]Trenes Argentinos Operacionesen.wikipedia.org

  Passenger trains returned to Mendoza Province via Palmira after an interruption dating to 1993.

• 2015

  Major Buenos Aires commuter lines renationalized

  [1]Trenes Argentinos Operacionesen.wikipedia.org

  SOFSE took over the Belgrano Sur, Roca, Mitre and San Martín lines after the government cancelled their private concessions.

• 2013

  Tren de la Costa transferred to the state operator

  [1]Trenes Argentinos Operacionesen.wikipedia.org

  SOFSE assumed operation of Tren de la Costa after the state revoked its private concession.

• 2010

  First operating assignment in Chaco

  [1]Trenes Argentinos Operacionesen.wikipedia.org

  SOFSE began operating passenger services in Chaco Province after taking them over from Servicios Ferroviarios del Chaco.

• 2008

  Creation of Operadora Ferroviaria

  [1]Trenes Argentinos Operacionesen.wikipedia.org

  Law 26.352 created Operadora Ferroviaria Sociedad del Estado as the state entity responsible for passenger railway operations, alongside a separate infrastructure administrator.

A state-owned national passenger railway operator focused on maintaining and expanding public rail services, especially Buenos Aires commuter routes and strategic intercity connections.

• Metropolitan passenger rail · 2015

  Buenos Aires commuter rail

  SOFSE operates major suburban passenger lines in the Buenos Aires metropolitan area, including Mitre, San Martín, Roca and Belgrano Sur. These services connect the capital and surrounding Buenos Aires Province with dense residential, commercial and industrial areas. Their transfer to SOFSE in 2015 made metropolitan commuter rail the company's most important operating segment.

• Long-distance passenger rail · 2014

  Buenos Aires–Mar del Plata

  This intercity service links Buenos Aires with Mar del Plata, a major coastal city and tourist destination. New Chinese-built trains acquired through CNR Dalian entered service on the route in 2014. The corridor is one of the most visible long-distance passenger services associated with the Trenes Argentinos operating network.

• Long-distance passenger rail

  Buenos Aires–Rosario

  The Buenos Aires–Rosario service provides an intercity connection between Argentina's capital and Rosario. In 2016, its Rosario terminus was moved from Rosario Sur to Rosario Norte, placing the endpoint closer to central Rosario. The route forms part of the operator's principal northwestern Buenos Aires corridor.

• Long-distance passenger rail · 2015

  Buenos Aires–Córdoba

  SOFSE operates or has operated a long-distance service between Buenos Aires and Córdoba using CNR CKD8 trains acquired from China. The route has been affected by poor track conditions, producing journey times of approximately 19.5 hours for a distance of about 700 kilometres. It was reported as indefinitely suspended in late 2025 while track repairs continued after a derailment.

• Long-distance passenger rail · 2023

  Buenos Aires–Mendoza via Palmira

  The Mendoza service was restored in 2023 after passenger operations to the province had been interrupted since 1993. Palmira was selected as the terminus because Mendoza's former railway station had become part of the Metrotranvía network. The service was criticized for its approximately 27-hour journey time and was later among the routes reported as suspended.

• Regional passenger rail · 2010

  Regional passenger services

  The operator has run regional services in provinces including Chaco, Salta, Buenos Aires, Entre Ríos and Santa Fe. These routes support public transport outside the Buenos Aires metropolitan area, but their continuity depends heavily on local demand, infrastructure condition, bridge availability and government operating decisions.

• 2025

  Indefinite suspension of selected long-distance servicesOther

  Background

  Track repairs were required after a derailment in September, affecting the viability of long-distance operations.

  Action taken

  Services toward Córdoba and San Miguel de Tucumán were reported as indefinitely suspended in December.

  Aftermath

  The referenced material does not provide a reopening date.

  Source

• 2024

  Suspension of services affected by infrastructure damageOther

  Background

  Several routes faced infrastructure failures, maintenance requirements, bridge damage, declining demand or rising operating costs.

  Action taken

  The operator suspended or closed services including Mercedes–Tomás Jofré, Retiro–Justo Daract, Retiro–Palmira and Bragado–Pehuajó.

  Aftermath

  The Mercedes–Tomás Jofré tourist service remained inactive after a truck destroyed a bridge that was not subsequently repaired.

  Source

• 2023

  Restoration of service to Mendoza ProvinceProduct launch

  Background

  Passenger service to Mendoza had been interrupted since 1993, while the former Mendoza railway station had been incorporated into the Metrotranvía network.

  Action taken

  Trenes Argentinos restored the route with Palmira as its terminus, approximately five kilometres from Mendoza.

  Aftermath

  The service resumed in June after a delayed launch and was criticized for a journey time of about 27 hours.

  Source

• 2016

  Suspension of La Pampa passenger servicesOther

  Background

  The Santa Rosa–General Pico route faced low passenger demand and bridge deterioration after flooding.

  Action taken

  The Ministry of Transport ceased operation of the service.

  Aftermath

  Passenger rail service on the route was suspended; no restoration date is provided in the reference material.

  Source

• 2015

  Takeover of four Buenos Aires commuter linesStrategy

  Background

  The Argentine government cancelled the concessions held by Argentren and Corredores Ferroviarios for the Belgrano Sur, Roca, Mitre and San Martín lines.

  Action taken

  SOFSE assumed direct operation of the four commuter systems on 2 March 2015.

  Aftermath

  The transfer significantly expanded the company's metropolitan role and established it as a central public operator of Buenos Aires commuter rail.

  Source

1. 1Trenes Argentinos Operacionesen.wikipedia.org