The European Conference of Transport Research Institutes (ECTRI) celebrated the 20 Years of Achievements in Sustainable and Multimodal Mobility Research, in conjunction with the Annual Plenary Meetings of Members and of Thematic Groups, which took place with great success in Brussels, on 16 November 2023. Key achievements were highlighted and discussions focussed on how can research drive future green and inclusive mobility and the transformative impact of research on transport policyNTUA actively contributed with the following presentations: