1. Department of Traffic Accident Expertise, Faculty of Transport and Traffic Sciences, University of Zagreb, Zagreb, Croatia;
2. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Hongshan District, Wuhan, China;
3. School of Civil and Environmental Engineering, Nanyang Technological University, Singapore;
4. Department of Traffic Signaling, Faculty of Transport and Traffic Sciences, University of Zagreb, Zagreb, Croatia