1. Faculty of Civil Engineering and Architecture Osijek, Josip Juraj Strossmayer University of Osijek, Vladimir Prelog St. 3, 31000 Osijek, Croatia
2. Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia
3. Institute of Transportation CIP, Nemanjina 6/IV, 11000 Belgrade, Serbia