The Publications Office of the European Union  and the ISA² programme of the European Commission organised with great success the European Data Conference on Reference Data and Semantics (ENDORSE) which was held online on 16-19 March 2021. The Conference created an opportunity to link expertise to tackle current and future issues in the fields of interoperability and knowledge management including aspects of road safety.  NTUA actively contributed with the following presentation from the The Horizon 2020 project BeOpen (European forum and observatory for open science in transport): ppt5 FAIR Challenges in Transport Open Science