the public transport, the government decided to create an improvised commuter rail service to connect Santiago with Talagante in the west, and Rancagua in the south. The service was a success and it was decided to test the capabilities during the following week. Given the success of the service between Santiago and Rancagua, it was formally established in October 25, suspending all services to Talagante because of low demand. One year later, on May 11, 1991, a service to Til Til and Batuco, both towns in the north of Santiago, was created using the old line between Santiago and Valparaíso, yet the service was also suspended because of low demand. The rolling stock consisted in three reconditioned AEL (Automotor Eléctrico Local, Local Electrical Motorcar) made by Kawasaki Heavy Industries and Hitachi, and exported by Nissho Iwai in 1973, in order to serve the lines between Santiago and Valparaíso, and between Santiago and Talca. In 1997, the Chilean government reached an agreement with RENFE, in order to buy 16 UT-440 trains. The purchase was completed in 2001, with 4 of the units destined to the Valparaíso Metro, and the remaining 12 to the Metrotren line. On December 28, 2000, the service was extended from Rancagua to San Fernando, and on June 27, 2002, a new station was added near the Buin Zoo. In 2006, given the crisis inside EFE after a corruption scandal that led the company to almost bankruptcy, it was decided to empower the most profitable services in order the national rail system. The Metrotren line received a complete renovation in communications, electrification, signaling and station infrastructure, as well as the rolling stock was painted orange in order to facilitate the use in other EFE services like Biotren. In 2009, the services were again changed in painting and seat configuration. During that year, the first administration of Michelle Bachelet left planned an express service to Rancagua, in order to reduce travel time to 55 minutes. The project was taken by the first administration of Sebastián Piñera in their public transport master plan towards 2025, and it was decided to add another express service to Nos, integrating the commuter rail services with the public transport of Santiago, facilitating the transfer to and from buses and Metro system with the integrated fare that existed within the latter two since 2007. Second era (2017-2021) In 2016, after 4 years of construction, the