[Bicycle accidents--causes and sequelae. An evaluation of the 1986 calendar year].

In a population of 402 motorcyclists and bicyclists, which were treated in the Traumatological Department of the University of Freiburg during 1986, we describe the different cause, spectrum and follow-up of the injuries. The special risk factors are discussed. The social implications show the importance of preventive measures to limit the risk of injury. With respect to the 70% of injured bicyclists with severe head injury, the wearing of safety helmets is strongly advocated. The effectiveness of cycle lanes is substantiated by our results.