Abstract
In both Germany and Denmark bills have been passed, that mopedists and motorcyclists should wear crash helmets in traffic. An investigation has been performed in an effort to elucidate the practical lifesaving effect of such measures. 188 mopedists killed in traffic accidents were submitted to medico-legal examination. Following a thorough consideration of the circumstances and findings in each case, it is concluded that 51% of the killed moped drivers probably should have survived if they had worn an appropriate crash helmet. A further 8.5% might have survived.