Alstom-VAF joint venture to supply EMUs to Trensurb November 27, 2012 | Latin America Company News Trensurb, the Porto Alegre regional metro operator, has awarded a contract for 15 four-car electric multiple units (EMUs) to a joint venture of Construcciones y Auxiliar de Ferrocarriles (CAF) and Als... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password