The analysis of 4,682 crashes with personal injury from several federal states in Germany in 2019 found that crashes in driveways points accounted for 4 percent of fatalities, 12 percent of serious injuries, and 15 percent of slight injuries in all car/bicycle crashes. The most common causes of accidents in driveways are errors when mistakes made when entering the flow of traffic (32 %) or mistakes when turning (9 % to the left, 7 % to the right).
With additional In-depth analyses using the insurers' accident database (UDB), it was possible to gain further insights into these accidents:
- About 18% of the accidents and 15% of all seriously injured and killed bicyclists in the investigated group of cases (n=615 accidents) took place in driveways. The cyclists were always injured and most of them seriously.
- In more than half of the relevant cases (n=114), the car drove forward out of the property. For these accidents, the ranking of the most frequent property types showed that - if no vans were taken into account - gas stations and private parking lots were frequently represented with 26% each.
- The analyses also showed that structural visibility restrictions - mostly in the form of hedges and shrubbery - play a notable role in causing accidents; these accounted for about half of the cases involving forward-exiting cars or a quarter of all accidents at driveways to properties.
In terms of possible counter-measures, autonomous emergency braking systems (AEB) with detection of cyclists are the first option, in addition to infrastructure and behavior-based measures. It was shown that only an improved system (AEB+), in which the sensors are not disturbed by structural visual obstacles, can achieve a higher safety benefit in the form of 29 percent avoidable accidents.