The purpose of the research paper is to observe and analyze how the economic growth of EU countries is accompanied by growth of motorization rate and fatalities during the last decades in terms of inventory on increase of motor vehicles and accidents in road traffic in order to identify regulation of the motor insurance legislation. Research methodology is statistical analysis of economic growth and motorization rate and the accidents in the EU countries during the period of 2000–2017. In the research paper the quantitative analysis and comparison method are applied. Findings: research paper shows that in the EU countries with higher income level, the rate of increase in motor vehicles is lower than the decline in fatalities per motor vehicle, and in countries with low income level the rate of increase in motor vehicles is higher than the decline in fatalities per motor vehicle. Practical implications: research paper demonstrates road traffic authorities need to know these specificities and take this into account in preparation of legislation to strengthen EU rules on motor insurance to better protect victims of motor vehicle accidentsOriginality – paper analyses the relationship between motorization levels and fatalities of different EU countries during last decades.