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[Fatal bicycle accidents--causes and legal responsibility].

Ninety-nine bicycle and motorcycle accidents were analyzed that had taken place from 1980 to 1984 in and around Frankfurt on the Main. The postmortem examinations were done in the Center of Forensic Medicine at the University of Frankfurt. Twenty-five percent of the bicycle riders were children up to the age of 15 years and 25% were elderly people over the age of 60. Most of the people involved in motorcycle accidents were between 17 and 24 years of age. The greatest amount of accidents took place in the summer, but in October there was also a peak. On weekdays, Thursday was the day when most of the accidents happened and Sunday showed the least. About 50% of the bicycle accidents happened in the city; 44% of the motorcyclists had lethal accidents on normal roads in the country. The most dangerous situation for bicycle riders was created by fast vehicles following them, but intersections proved to be a danger point, too. Nearly 40% of the motorcycle accidents were not caused by other vehicles. The most frequent cause of death was head injuries (45%), followed by injuries of the internal organs and spine. Many bicycle riders caused the accidents themselves (43.6%). Most of the fatal motorcycle accidents were caused by others (56%). In all of the cases studied, 30% of the participants involved had a relevant blood-alcohol concentration.