Line FA (Tren Interoceánico)

The Coatzacoalcos–Palenque Line (Línea Coatzacoalcos-Palenque), also known as the FA Line (Línea FA), is a railroad owned by the Mexican government, connecting Coatzacoalcos, Veracruz, and Palenque, Chiapas. It was leased to the Ferrocarriles Chiapas-Mayab company.

Renovation
On 1 May 2022, president Andrés Manuel López Obrador announced an investment of 30 billion pesos for the rehabilitation of the section that goes from the city of Coatzacoalcos, Veracruz, to the city of Palenque, Chiapas, in the southeast of the country. Freight operations on the Coatzacoalcos-Salina Cruz segment had begun by September 2023.

Passenger service was originally planned to return to the FA Line in March 2024, although by 1 March, the federal government of Mexico was planning on beginning passenger service "in the middle of 2024".

Proposed branch line
In addition to the currently under-construction FA Line, there are plans to build a branch line for freight trains from Roberto Ayala to Dos Bocas, Tabasco, in Tabasco. This branch would begin at the Roberto Ayala station, near the Tabasco-Chiapas border. The branch would travel through the Huimanguillo, Cárdenas, Cunduacán, Comalcalco, and Paraíso municipalities, ending at the port of Dos Bocas, where it would connect with the Olmeca Refinery.

In March 2022, the Secretariat of Finance and Public Credit reported that the new branch would cost 6,054 million pesos.

Connections
The Coatzacoalcos–Palenque Line will join with Line Z of the Isthmus of Tehuantepec Railway at Coatzacoalcos railway station, and with Tren Maya at Palenque railway station.