1. 1 University of Žilina , Department of Railway Transport , Univerzitná 8215/1 , Žilina , Slovak republic
2. 2 Institute of Technology and Business in České Budějovice , Department of Transport and Logistics , Okružní 517/10 , České Budějovice , Czech Republic
3. 3 International Union Of Railways, Chargé de Mission , 16 rue Jean Rey, F – 75015 Paris , French Republic