The European Commission has recently published the “Study on the feasibility, costs and benefits of retrofitting advanced driver assistance to improve road safety“, prepared by VTT and Ecorys. This study examined the technical feasibility of various retrofit ADAS systems (voluntarily or mandatory installable) while demonstrated the potential safety impacts of retrofitting the vehicle fleet and presented a cost-benefit assessment for the measures.  Detection and warning of pedestrians and cyclists nearby the front or side of the vehicle proved having the highest benefit-cost ratio, as addressing the Vulnerable Road Users safety, being the key current road safety problem.