Ralf Risser is a psychologist and sociologist (University of Vienna). Owned a private research institute FACTUM OG 1988–2019. Part-time work at Institute of Technology & Society, TU Lund, Sweden 1988–2013, 2006–2013 Adjunct Professor. 2011–2017 President of International Cooperation on Theories and Concepts in Traffic safety (ICTCT). Key researcher in projects such as EU-funded CONSOL, investigating case of the elderly in connection with traffic safety and mobility. Currently, Visiting Professor at the Palacký University Olomouc, Czechia, Department of Psychology. Elderly road users, vulnerable road users, and qualitative methods are in the focus of his research.Matúš Šucha (26 April 1980, Bratislava) is a Czech traffic psychologist and a professor of psychology at Palacký University, Olomouc, Czechia. His main area of professional interest is traffic psychology, with a specific focus on mobility and traffic safety. He is a former vice-president of International Cooperation on Theories and Concepts in Traffic safety (ICTCT).