High Quality Content by WIKIPEDIA articles! The São Paulo Metro (Portuguese: Metropolitano de São Paulo, commonly called Metrô, called Subway on the boards in English) is the city of São Paulo's rapid transit system. Companhia do Metropolitano de São Paulo - Metro was founded on 24 April 1968. Eight months later, work on North-South line was initiated. On 1972, the first train trip occurred between Jabaquara and Saúde stations. On 1974, the segment between Jabaquara and Vila Mariana entered into commercial operation. Today, São Paulo Metro is in charge of Metro operation and expansion, a high capacity and interlinking system for mass transport in Metropolitan Area. Operative since September 14, 1974, Metro has an extension of 61.3 km (38.3 mi) railway tracks distributed into four lines and linking 55 stations. Lines 1-Blue (Jabaquara - Tucuruvi), 2-Green (Alto do Ipiranga - Vila Madalena), and 3-Red (Corinthians Itaquera - Palmeiras Barra Funda) operate every day, including Saturday, Monday, and holidays. Line 5-Lilac operates from Sunday to Saturday, from 4:40 a.m. to 24:00 a.m.