1. Department of Transport Technology and Economics (KUKG), Faculty of Transport Engineering and Vehicle Engineering (KJK), Budapest University of Technology and Economics (BME), Műegyetem rkp. 3, 1111 Budapest, Hungary
2. Department of City Planning Engineering, Technical College of Engineering, Sulaimani Polytechnic University, Sulaimani 46001, Iraq
3. Institute of Mathematics and Informatics, University of Nyíregyháza, 4400 Nyiregyhaza, Hungary