Metrorex exercises additional rolling stock options from CAF for Bucharest Metro November 18, 2014 | Europe Company News Metrorex SA, the operator of the Bucharest Metro, has exercised an option to order an additional eight six-car trains from Spain-based Construcciones y Auxiliar de Ferrocarriles (CAF) for ... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password