Mexico City Metro introduces five rehabilitated trains; to invest USD42.9 million for Line 12 repair September 4, 2016 | Latin America Finance Sistema de Transporte Colectivo (STC), the government body responsible for the Mexico City Metro, has introduced five rehabilitated trains on metro lines 3, 4, 5 and 6. Each rehabilitated train ... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password