Siemens Mobility to install signalling system of Buenos Aires Metro Line D, Argentina July 19, 2020 | Europe Company News Germany-based Siemens Mobility has secured a contract from Subterráneos de Buenos Aires, Sociedad del Estado (SBASE) to install a communications-based train control system (CBTC) on Buenos Aire... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password