ZOS Vrutky wins train modernisation contract from ZSS November 2, 2009 | Europe News Bratislava-based passenger railway operator in Slovak Republic, Zeleznicna Spolocnost Slovensko (ZSS), has awarded a EUR28.42-million contract to Slovenia-based ZOS Vrutky to modernise its rolling sto... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password