High Quality Content by WIKIPEDIA articles! The Metropolitana di Torino (Turin Metro) is a VAL metro system connecting Turin city centre, Italy, with the neighbouring city of Collegno. It is operated by Gruppo Torinese Trasporti (GTT), a public company controlled by the municipality of Turin. At present, the system comprises one line with 21 stations which connects Fermi station in Collegno with the Lingotto multifunctional centre in Turin.