The 2023 infographic of NTUA Road Safety Observatory ( highlights one more very intensive and highly fruitful year. The nrso scientific team with high dedication, efficiency and expertise continues to grow and excel, being active in 31 innovative research projects, succeeded to publish 49 scientific papers (23 in peer reviewed journals), and travelled around the world in hundreds of meetings to develop and promote road safety science. The 30 Marathons campaign for promoting 30km/h city-wide speed limit was also widely welcomed, contributing to the culture of calm and safe streets everywhere and for all. pdf5