The 15th World Conference on Transport Research (WCTR) which was organized by the WCTRS and the Indian Institute of Technology Bombay (IIT Bombay) took place with great success on 26-31 May, 2019 at Mumbai, India. For the last 40 years, WCTR has been organised every three years by the WCTR Society. WCTR allowed sharing cutting-edge research and advanced state-of-practice and provided a unique opportunity for experts to exchange ideas in all areas of transport research including Traffic Safety Analysis and Policy (C4 Special Interest Group).   NTUA contributed with nine presentations: