A Diploma Thesis titled ‘Correlating macroscopic road safety parameters in the European Union’  was presented by Anna Tsoumani in November 2006. Linear and non-linear regression models were developed and resulted in quantification of the impact of each variable to the number of fatalities in road accidents. The ratio of the number of road fatalities to the number of vehicles reduces by the increase of the ratio of the number of vehicles to population and secondly, the shape of the fatalities curve (ascending, stable and descending) depends on the ratio of the number of vehicles to population.