From data in the literature it is shown that a considerable proportion of crash helmets become unfastened during accidents. After a study of possible causes from a literature review it was concluded that up to the present time no research had been carried out into the most obvious one, the imperfect closing of the strap around the chin. It was decided to study the frequency with which this happened by means of observation of the traffic. The proposed interview-method (see IRRD 287670) was tested in a pilot study from which it was shown that the effectiveness of the method was only good for moped riders. For motorcyclists an alternative method was sought. This alternative method was also tested in a pilot study. This report discusses the set-up and the preparation of the study relating to motorcyclists.
Samenvatting