A Warning System with Multiple Sensors for Avoiding Collision of Bicycles

In recent years, traffic accidents relating to bicycles have been decreasing. The reason for this is that the improvement in car safety has greatly reduced the number of accidents between bicycles and cars. However, contact accidents between bicycles have not been reduced. In this study, we focus on collision between bicycles and propose a warning system for avoiding that. Accident avoidance systems using sensors have been introduced in recent automobiles. Even in bicycles, the number of accidents might be reduced by using sensors to detect and notify the presence of other bicycles. Our proposed system consists of multiple sensors installed on a road to detect bicycles, a control device which predicts the possibility of collision from sensed data such as distance and time, and an output device alerting the drivers. The usefulness of the warning and the appropriate timing of warning are evaluated by experiments.