Effektivitätsuntersuchung des Modellversuches Fahren mit Licht am Tag der Grazer Verkehrsbetriebe. Im Auftrag vom Kuratorium für Verkehrssicherheit.

An analysis of accidents in which busses and trams of the city of Graz were involved, during the time that daytime running lights (DRL) were used, showed that during that time 21. 6% less accidents occurred, and after that time the accidents increased with 20. 9%. These results are considered as a further affirmation of the theory on the effectiveness of DRL.