Among the operators killed, one fifth were illegally operating the motorcyle. A remarkable statistical difference in distribution of accidents involved motorcycles and the total distribution of motorcycles in the county was reported, thus finding an over-representation of heavy motorcycles in the present study. No important differences were found in the distribution of type of accidents compared to other studies. In the present study, all but one victim were tested for blood-alcohol concentration (BAC). The results differ from previous studies in as much as 50 percent of the killed operators of an accident involving motorcycles had a BAC above 0.08 percent. The reported distribution by age, licensing experience and size of motorcycle in fatal motorcycle accidents seems to support introduction of a graduated license depending on motorcycle size as well as operator age. Furthermore a limitation in the right to carry a pillion passenger should be considered, and the operator of the motorcycle carrying a pillion passenger should be held responsible for the passenger wearing a helmet. (Author abstract)