Sistema de Transporte Colectivo (STC), Mexico: Focus on improving the metro system January 1, 2016 | TA/ TSO Focus Sistema de Transporte Colectivo (STC) is a public agency responsible for the construction and operation of the Mexico City Metro. It was established in 1967 to provide sustainable transport of interna... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password