1. Faculty of Transport, Electrical Engineering and Computer Science, Casimir Pulaski Radom University, Malczewskiego 29 Street, 26-600 Radom, Poland
2. Office of Rail Transport (UTK), Aleje Jerozolimskie 134 Street, 02-305 Warsaw, Poland
3. Department of Transport and Handling Machines, Faculty of Mechanical Engineering, University of Žilina, Univerzitná 8215/1, 01026 Zilina, Slovakia
4. Faculty of Transport, Warsaw University of Technology, Koszykowa Street 75, 00-662 Warszawa, Poland