Road safety effects of roundabouts in Flanders

This paper analyzes the effect on road safety of 95 roundabouts that were built in Flanders between 1994 and 1999. The study shows that the effect on the number and severity of road accidents adjusted for the trend and regression to the mean is significant, but varies considerably in accordance with the speed limit regime on the intersection. Roundabouts are most effective on intersections of a main road with a high speed limit (90 km/h) and a adjacent road with a lower speed limit (50 or 70 km/h). The empirical analysis reveals a reduction of 34% (varying between 15 and 59%) for the total num... Mehr ...