Tren Interoceánico

Tren Interoceánico is the public-facing name for Mexico’s redevelopment of the Ferrocarril del Istmo de Tehuantepec, a government-owned railway system designed to move passengers and freight across southern Mexico between the Pacific and Atlantic oceans. The system is centered on the Isthmus of Tehuantepec, where the relatively short land connection between the ports of Salina Cruz, Oaxaca, and Coatzacoalcos, Veracruz, offers an alternative route to maritime transport through the Panama Canal or around the southern tip of South America. The operating entity, Ferrocarril del Istmo de Tehuantepec, was created in 1999 to operate the railway between Salina Cruz and Medias Aguas in Veracruz. The wider railway network also includes routes in southeastern Mexico. The Mayab and Chiapas lines had previously been leased to Ferrocarriles Chiapas-Mayab, but that arrangement ended after Genesee & Wyoming relinquished its concession in 2007. The railway subsequently became part of a broader state-led effort to restore and expand rail infrastructure in the region. A major redevelopment phase began on 7 June 2020 under President Andrés Manuel López Obrador. The program involved track renovation, station rehabilitation, restoration of passenger services, and the creation of associated industrial and logistics facilities. Initial planned spending was reported at more than 3 billion Mexican pesos, with total project allocations expected to reach approximately 20 billion pesos. Because the available reference material does not provide a sufficiently documented final expenditure figure, no completed-cost estimate is stated here. The core route is Line Z, linking Coatzacoalcos and Salina Cruz over approximately 303 kilometres of mostly single track. Passenger service on the line began in December 2023, after freight operations were inaugurated in September of that year. The route was planned around seven stations and a journey of roughly seven hours. Existing stations were renovated while retaining elements of their historic architectural character. The redevelopment target was to raise freight-train speeds from approximately 20 kilometres per hour to as much as 70 kilometres per hour, while passenger trains were planned to reach up to 100 kilometres per hour. The project is broader than a passenger railway. Its stated ambition is to form a global logistics network combining railways, ports, industrial parks, and manufacturing activity. Line Z is associated with industrial development along the isthmus, while Line FA connects Coatzacoalcos with Pakal Ná near Palenque and provides a connection with the Tren Maya network. A branch reaches the Dos Bocas area and the Olmeca refinery. Line K is intended to run from Ixtepec toward Ciudad Hidalgo and connect with Guatemala’s rail network, with a further branch serving Tapachula and Port Chiapas. Rolling stock assembled for the service has included a mixture of refurbished or second-hand equipment from Mexico, the United States, Canada, and the United Kingdom. Reported equipment includes former British Rail InterCity 125 locomotives and Mark 3 coaches, EMD SD70M freight locomotives acquired from Union Pacific, passenger cars obtained through Railway Excursion Management Company, F59PH locomotives, Budd SPV-2000 cars, and Stadler Citylink units formerly used on the Puebla–Cholula Tourist Train. The variety of equipment reflects the project’s rapid restoration and launch approach rather than a single standardized fleet. Tren Interoceánico therefore functions simultaneously as a passenger railway brand, a freight corridor, a port-and-industry development program, and a strategic national infrastructure initiative. Its long-term success depends on completing the line network, improving operating speeds and reliability, developing intermodal cargo capacity, and attracting industrial activity to the corridor. The available material confirms active services and ongoing strategic expansion, but does not est…

The institutional foundation of the modern Tren Interoceánico dates to 1999, when the state-owned Ferrocarril del Istmo de Tehuantepec was established to operate the railway connecting Salina Cruz, on Mexico’s Pacific coast, with Medias Aguas in Veracruz. The company inherited responsibility for a strategic but underused railway corridor across the Isthmus of Tehuantepec. The network’s regional history also includes the Mayab and Chiapas lines, which were formerly operated under lease by Ferrocarriles Chiapas-Mayab. That concession ended in 2007 after Genesee & Wyoming surrendered it, leaving the Mexican state with a larger role in the lines’ future. For many years, the corridor’s infrastructure and services remained limited. The route had potential because it links the ports of Salina Cruz and Coatzacoalcos across a relatively narrow section of Mexico, but low operating speeds and degraded infrastructure restricted its competitiveness. The railway was consequently recast as more than a conventional passenger line: the policy objective became an integrated logistics corridor combining rail transport, port activity, industrial parks, and manufacturing investment. A new redevelopment phase was formally launched on 7 June 2020 by President Andrés Manuel López Obrador. The program called for track renovation and the rehabilitation of passenger transport, alongside improvements intended to make the railway useful for freight. Reported initial investment exceeded 3 billion Mexican pesos, while the broader planned allocation was approximately 20 billion pesos. The project’s stated operational targets included increasing freight speed from about 20 kilometres per hour to 70 kilometres per hour and enabling passenger trains to reach speeds of up to 100 kilometres per hour. Line Z became the first major operating component of the renewed system. Freight service was inaugurated on 17 September 2023, followed by passenger service on 22 December 2023. By December 2023, the line was described as serving seven stations over about 303 kilometres of single track between Coatzacoalcos and Salina Cruz, with a journey time of approximately seven hours. Stations selected for the project were extensively renovated, although their original architectural character was retained where possible. The network subsequently expanded beyond Line Z. Line FA was planned to connect Coatzacoalcos with Pakal Ná near Palenque, creating a transfer opportunity to the Tren Maya, and included a branch serving the Dos Bocas area. Line K was designed to connect Ixtepec with Ciudad Hidalgo and ultimately link with Guatemala’s railway network. Its associated branch, Line KA, connects Tapachula with Port Chiapas. A further branch, designated ZA, links the Hibueras area with the Minatitlán refinery. These routes demonstrate the project’s combination of passenger mobility, freight distribution, port access, refinery access, and regional integration. The rolling-stock strategy relied on equipment from several sources. In 2023, reports identified former British Rail InterCity 125 Class 43 locomotives and Mark 3 coaches being exported to Mexico. Other equipment included three EMD SD70M locomotives formerly associated with Union Pacific, passenger cars acquired through Railway Excursion Management Company, F59PH locomotives, Budd SPV-2000 cars, and Stadler Citylink trainsets formerly used on the Puebla–Cholula Tourist Train. Some of this equipment was used or displayed in connection with the launch of Line Z. The mixed fleet allowed services to begin while the broader infrastructure project was still being developed, but it also implies continuing challenges related to maintenance, interoperability, and standardization. The project’s long-term rationale is to create a commercially significant land bridge between the Atlantic and Pacific coasts, support industrial development along the corridor, and provide an alternative or complement to maritime routes. Its development has taken place alongside other Mexican rail initiatives, particularly the Tren Maya and El Insurgente. The reference material confirms the launch of passenger and freight operations and the planned multi-line structure, but does not establish that every proposed route, industrial park, or logistics objective has been completed. It also reports a serious Line Z derailment near Asunción Ixtaltepec in December 2025; that event requires careful verification against authoritative official and contemporary reporting before its consequences can be assessed fully.

1. 2024Line FA passenger service opened

   Passenger operations began on Line FA, extending the system toward the Palenque area and the Tren Maya interchange.

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2. 2023Line Z freight service inaugurated

   Freight operations began on the principal Coatzacoalcos–Salina Cruz corridor.

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3. 2023Line Z passenger service launched

   Passenger trains began operating on Line Z on 22 December.

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4. 2020Redevelopment program launched

   Track renovation and passenger-service rehabilitation began under the federal government’s Interoceanic Corridor program.

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5. 2007Chiapas-Mayab concession ends

   Genesee & Wyoming gave up its concession for the Mayab and Chiapas lines, increasing the state’s role in the regional railway network.

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6. 1999Ferrocarril del Istmo de Tehuantepec established

   The Mexican state-owned railway company was founded to operate the route between Salina Cruz and Medias Aguas.

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A state-led intermodal transport and industrial-development corridor connecting Mexico’s Pacific and Atlantic coasts through the Isthmus of Tehuantepec.

• Line ZPassenger and freight railway2023

  The central Interoceanic route connects Coatzacoalcos in Veracruz with Salina Cruz in Oaxaca across the Isthmus of Tehuantepec. It supports both freight and passenger operations and was described as covering about 303 kilometres with seven stations. The route is intended to serve ports, industrial areas, and logistics facilities as well as conventional passenger travel. Its redevelopment included track work and station restoration, with station designs retaining elements of historic architecture.

• Line FAPassenger and freight railway2024

  Line FA connects Coatzacoalcos with Pakal Ná near Palenque, where it provides a transfer connection to the Tren Maya network. The route also has a branch toward the Dos Bocas area. It broadens the Interoceanic system beyond the trans-isthmus corridor and supports passenger mobility between the Gulf coast, southeastern Mexico, and other national rail projects.

• Line KPassenger and freight railway

  Line K is planned to connect Ixtepec in Oaxaca with Ciudad Hidalgo near Mexico’s southern border. Its strategic purpose is to extend the railway toward the Guatemalan rail network, creating the potential for wider regional freight and passenger connectivity. The reference material identifies the route and its intended international connection but does not establish the completion status of all planned sections.

• Line KAPort branch

  Line KA is a branch associated with Line K that connects Tapachula with Port Chiapas. It is intended to support access to the Pacific port and improve the corridor’s ability to handle regional cargo and passenger movements.

• Branch DBFreight branch

  The DB branch links Roberto Ayala with the Olmeca Refinery station at the Port of Dos Bocas in Paraíso. It is designated for freight use and is intended to connect the railway system with one of Mexico’s strategically important energy and port facilities.

• Branch ZAIndustrial freight branch

  Branch ZA connects Hibueras with the Minatitlán refinery. Its role is industrial and freight-oriented, providing railway access to refinery infrastructure in the Coatzacoalcos–Minatitlán area.

• Passenger rail servicesPassenger transportation2023

  Passenger services are the public-facing component of Tren Interoceánico. Services began on Line Z in December 2023 and on Line FA in September 2024. The redevelopment plan envisages passenger trains operating at speeds of up to 100 kilometres per hour, although the available material does not document average commercial speeds or detailed service frequencies.

• Freight and logistics servicesRail freight and intermodal logistics2023

  Freight operations are central to the project’s commercial rationale. The corridor is intended to move goods between the Pacific and Atlantic coasts, connect ports with industrial parks and refineries, and support manufacturing investment along the isthmus. The planned infrastructure improvements target substantially higher freight speeds than the pre-redevelopment railway.

• 2024Extend passenger operations to Line FAGeneration change

  The project was designed as a multi-line southeastern Mexican network rather than a single trans-isthmus route.

  What changed. Passenger service on Line FA opened on 13 September 2024, extending the system toward Pakal Ná near Palenque.

  Aftermath. The service created a connection opportunity with the Tren Maya and expanded the Interoceanic brand’s regional passenger role.

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• 2023Launch Line Z freight operationsProduct launch

  The redevelopment program required an initial operating corridor linking Coatzacoalcos and Salina Cruz.

  What changed. Freight operations were inaugurated on Line Z on 17 September 2023.

  Aftermath. The launch established the corridor’s initial commercial railway function before passenger service began later that year.

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• 2023Launch Line Z passenger serviceProduct launch

  Passenger transportation was a central element of the government’s railway rehabilitation plan.

  What changed. Passenger service began between Coatzacoalcos and Salina Cruz on 22 December 2023.

  Aftermath. The project moved from infrastructure redevelopment into public passenger operations on its principal trans-isthmus route.

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• 2020Redevelop the railway as an intermodal logistics corridorStrategy

  The existing railway had low operating speeds and limited capacity, while the Isthmus offered a strategic connection between Pacific and Atlantic ports.

  What changed. The federal government began renovating tracks, rehabilitating passenger transport, and planning associated ports, industrial parks, and logistics infrastructure.

  Aftermath. The strategy led to the launch of freight service on Line Z in 2023 and passenger operations on Lines Z and FA. The completion status of all associated infrastructure remains unclear from the supplied sources.

  Reported planned investment. More than 3 billion Mexican pesos initially, with approximately 20 billion pesos planned for the broader project (2020 project launch)

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• 2025Reported Line Z derailment near Asunción IxtaltepecControversy

  The reference material reports that a Line Z train derailed near Asunción Ixtaltepec, Oaxaca, on 28 December 2025, causing 13 deaths and approximately 100 injuries. Because the supplied material cites the Wikipedia article rather than an official investigation or primary contemporary reporting, the event, casualty figures, causes, and institutional accountability should be independently verified.

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• 2024Line FA passenger service opens

  Passenger service on Line FA, linking Coatzacoalcos with the Palenque area and the Tren Maya connection, opened on 13 September.

  Product launch
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• 2023Line Z freight operations inaugurated

  The freight service on Line Z was inaugurated on 17 September as part of the corridor’s redevelopment.

  Product launch
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• 2023Line Z passenger service begins

  Passenger operations on the Coatzacoalcos–Salina Cruz route began on 22 December following the launch of freight operations earlier in the year.

  Product launch
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• 2023InterCity 125 equipment reported as bound for Mexico

  Reports described former British Rail InterCity 125 locomotives and Mark 3 coaches being shipped to Mexico for possible use on the Ferrocarril del Istmo de Tehuantepec.

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• 2020Mexico begins renovation of the Interoceanic railway corridor

  President Andrés Manuel López Obrador initiated the railway renovation and passenger-service rehabilitation phase of the Isthmus of Tehuantepec project.

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1. Tren Interoceánico
2. RailTech