ATT secures contract to operate public transport in Ferraz Vasconcelos, Brazil September 9, 2021 | Latin America News Alto Tiete Transportes Ltda (ATT) has secured a contract to operate the public transport system in Ferraz Vasconcelos in Greater São Paulo for a period of 15 years, starting from 2022. The cont... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password