Hyundai Rotem to maintain São Paulo commuter rail rolling stock June 26, 2018 | Latin America News South Korea-based Hyundai Rotem has secured a KRW80-billion rolling stock maintenance contract from Companhia Paulista de Trens Metropolitanos (CPTM), the developer and operator of the São Paulo commu... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password