May 2015 A very intensive, and noisy, traffic on a city-station. Non rush hour... Rolling stock; Type MX3000. Three-cars in one unit. Mostly two units in one train, except on line 1. Built by Siemens, model Siemens Modular Metro. 104 stations. Opened in 1966. Several extensions planned and upgrading to metro standard. Right hand traffic. European standard gauge, 1435 mm.