1. Assistant Professor, Faculty of Transport and Traffic Engineering, Univ. of Belgrade, Vojvode Stepe 305, 11000 Belgrade, Republic of Serbia (corresponding author).
2. Teaching Assistant and Ph.D. Student, Faculty of Transport and Traffic Engineering, Univ. of Belgrade, Vojvode Stepe 305, 11000 Belgrade, Republic of Serbia.
3. Ph.D. Student, Faculty of Transport and Traffic Engineering, Univ. of Belgrade, Vojvode Stepe 305, 11000 Belgrade, Republic of Serbia.