To reduce the costs of the system, the project uses the existing metre gauge rail line, which travels through Teresina.

It adopted diesel train-sets sponsored by RFFSA, which covered the stretch between Porto Alegre and Uruguaiana, which has the metre gauge track.

After the inauguration of the Engenheiro Alberto Tavares Silva/Bandeira station, daily ridership only increased to 8,000 in 2013.

[2] The Teresina Metro has plans to expand since it currently serves no major shopping center (besides the Shopping da Cidade which is populated by street vendors), the local soccer stadium, bus station or airport.

Diesel trains are running on a single-track line with meter gauge (1,000 mm (3 ft 3+3⁄8 in)), traveling at an average speed of 30 km/h (19 mph).