One traffic safety problem that has been observed in several studies is the wear of the windscreens. The risk of dazzling increases when driving with a worn windscreen, which may have the consequence that the driver does not discover objects or people on the road in front of the vehicle.
In this simulator study driver behaviour has been studied using three windscreens, one driven 150 000 kilometres, another driven 350 000 kilometresand one unused. The experiment has a within groups design. In this case this means that all 24 test persons drive under each experimental condition, i.e. everyone with each of the three windscreens. The driver passes two obstacles during each drive. To achieve dazzling in the driving simulator a lamp was mounted in front of the windscreen in the simulator. The lamp simulated a setting sun
Already with a windscreen used during 150 000 kilometres the driver behaviour is negatively effected. When the drivers were asked to express their opinion about the experiment, they assessed both the simulated environment and the driving task as relatively realistic.