October 1 (SeeNews) - Croatian state-owned railway infrastructure operator HZ Infrastruktura has awarded a 285.4 million kuna ($50.8 million/37.5 million euro) deal for the upgrade of the Zagreb Borongaj-Dugo Selo railway track to a tie-up comprising the Croatian unit of Austrian civil engineering company Swietelsky Baugesellschaft and local peer Pruzne Gradjevine, a public notice indicated on Tuesday.