The Transport Research Arena Conference (TRA 2020) organised by the European Commisison and the European transport research platforms (ACARE, ALICE, CEDR, ECTP, ERRAC, ERTRAC, ETRA, Waterborne), was scheduled to take place in Helsinki, Finland from 26-30th April 2020, themed “Rethinking transport – towards clean and inclusive mobility”. The conference was cancelled, though, due to the corona virus crisis.  Nevertheless, all scientific papers are scheduled to be published at the Conference Proceedings. NTUA’s TRA conference papers (full paper + presentation) are listed below: