Abstract
The causes of accidents involving nonconventional bicycle types have hardly been investigated in the literature to date. However, these vehicles could play an important role in reducing the CO2 emissions generated by traffic. As a basis for improving the driving safety of these environmentally friendly vehicles, this article presents the results of a survey on accidents and near-accidents of multitrack bicycle vehicles. More than 120 critical or accident situations of 86 drivers were analyzed. The situations are investigated with respect to the circumstances, the causes, and the consequences of the accidents using manual analysis and multiple correspondence analysis. A distinction is made between single accidents and accidents with another party. The aim of the survey is not to make statistically accurate statements on the frequency and probability of accidents, but rather to analyze the accident or near-accident circumstances. It is shown that the causes of single accidents are usually too high cornering velocities in combination with other factors such as road conditions. In the case of accidents with external involvement, the person who caused the accident is usually the other party involved. The accident opponent is in most cases a passenger car. Here the overlooking of the vehicles is the most frequent cause of accidents. Finally, possibilities to reduce the probability of accidents are briefly discussed for the different situations. As the research shows, most of the situations described occur on the road. This indicates that there are deficits in the bicycle infrastructure for the vehicles considered here. The results also indicate that there are deficits with regard to the perceptibility of the vehicles by other road users.
Highlights
Progressive climate change makes it necessary to use alternative transportation concepts to reduce CO2 emissions from transport
A preliminary inquiry to the German accident database GIDAS resulted in only a few registered accidents involving multitrack bicycle vehicles [23]
It could be shown that single accidents are mainly due to an inappropriate speed during cornering
Summary
Progressive climate change makes it necessary to use alternative transportation concepts to reduce CO2 emissions from transport. Velomobile bicycles in particular are suitable for medium distances, such as the daily trip to work [3]. A small amount of these vehicles will be multitrack vehicles Even if these vehicles are not very widespread so far, it is to be expected that in the course of the decarbonization of individual traffic a larger number of such bicycle vehicles will come onto the roads.
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