Siemens Mobility to install CBTC system on Frankfurt metro and tram network; and Oslo T-Bane Metro December 15, 2021 | Europe Company News Siemens Mobility has secured a contract from Stadtwerke Verkehrsgesellschaft Frankfurt am Main mbH (VGF) to install a new digital train control (DTC) system for its metro and tram network in Frankfurt... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password