The Transportation Research Board (TRB) organised with great success the 101st Annual Meeting, which was held on 9-13 January 2021 in Washington DC. The meeting program covered all transportation modes, addressing topics of interest to policy makers, administrators, practitioners, researchers, and representatives of government, industry, and academic institutions. A number of sessions and workshops  focused on the spotlight theme for the 2022 meeting: Innovating an Equitable, Resilient, Sustainable, and Safe Transportation System.  NTUA actively contributed with the following papers and presentations :