Abstract
Traffic accidents are the accident due to negligence. However, there is possibility of unavoidable accidents. This paper treats unavoidable accidents taking the crossing between left-turning vehicle and bicycle on the pedestrian crossing as an example. Bicycles are at high risk of accidents due to its speed by comparison with pedestrians. The points where vehicle drivers become aware of a bicycle are clarified by experiments. The time that vehicles require to stop at ultralow speed are analyzed by experiments. The dangerousness of crossing of left-turning vehicle and bicycle on the pedestrian crossing is studied using those experimental data.
