In urban areas almost every second injured or killed person in road accidents is registered at intersections. This reveals the particular importance of traffic safety issues at intersections. A key aspect on this topic is the safe design of the traffic infrastructure. At intersections often high numbers of road users coincide driving or walking in different directions. In consequence traffic flow at intersections can be very complex and in some circumstances confusing for the road users. The German Insurers Accident Research already conducted several research projects concerning the traffic safety of intersections.