[6][7][8][9] As of December 2023, Line Z served seven stations in 303 kilometres (188 mi) of single track, traveling between Coatzacoalcos and Salina Cruz for 7 hours.

[10] The old stations that were on the route and that were chosen to form the project, were completely remodeled, while retaining the original architectural style.

[11] In August 2023, the website Railtech.com reported a number of InterCity 125 high-speed train sets, originally built for British Rail, had been seen at the Port of Great Yarmouth being loaded on to a ship bound for Mexico.

Unconfirmed reports suggested this second-hand rolling stock was bound for the Ferrocarril del Istmo de Tehuantepec.

[25] In addition to these, on 26 August 2023, the two Stadler Citylink sets from the former Puebla-Cholula Tourist Train were brought to Coatzacoalcos railway station for use on the Ferrocarril Transístmico.