| 摘要 |
A bicycle safety device 10 comprises detection means 12 adapted to be mounted to a bicycle or rider for detecting the presence of a motor vehicle, alert means 16 adapted to be mounted to the bicycle or rider for alerting the driver of the motor vehicle to the presence of the bicycle, and projection means 18 for projecting a boundary line (22, figure 2) onto a road surface around the bicycle, the boundary line at least in part surrounding the bicycle. The means for alerting the approaching driver may be a radio transmitter. The detection means 12 may detect the speed of an approaching vehicle and adjust the size of the projected boundary line 22 accordingly. |
