CAF to retrofit Midland Metro fleet for catenary-free operations January 28, 2017 | Europe Company News The West Midlands Combined Authority (WMCA) has shipped the first tram of its fleet of 21, to Construcciones y Auxiliar de Ferrocarriles (CAF)’s Zaragoza factory to be retrofitted with batteries... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password