GTT expands open-loop ticketing to 25 additional public transport lines in Turin, Italy October 30, 2022 | Europe News, News Gruppo Torinese Trasporti (GTT) has expanded its open-loop contactless payment system to 25 additional public transport lines. The system was already available on bus lines 8, 55, 56, 58, 58B, and 68.... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password