The system was partially inaugurated on 24 November 2005 in a ceremony that counted with the presence of the then President of Chile, Ricardo Lagos.

The AEL and AES trains that the former system used were replaced by UT-440 MC(Modelo Concepcion) units that were specially upgraded for the city of Valencia, Spain by Renfe.

The fare is paid at the entrance and exit of the stations using a prepayment card called Biovías, with a deferred payment system according to the distance travelled.

[citation needed] The Empresa de Los Ferrocarriles del Estado (EFE) invested a total of US $16.800.000 for the trains used in the system.

The current fleet is composed of eight trains UT-440 Modelo Concepción of three wagons each, bought from the Red Nacional de Ferrocarriles Españoles (Spain State Railways, RENFE).