In the road traffic accident prone area, often laid speed bumps, to remind and help drivers to slow down, reduce the occurrence of traffic accidents. Speed bumps are generally plastic or cement speed bumps that protrude horizontally and are fixed on the road. When the vehicle passes through the speed belt, the driver often takes the initiative to slow down in order to avoid excessive vibration of the car, so as to achieve the effect of slowing down and reduce the occurrence of traffic accidents.
However, this is not the reality. After a speed bump, even if at a slower pace, vibration frequency will not reduce obviously, and car shock absorption performance is getting better and better now, cause the drivers often ignore the existence of speed bumps and quickly by, experienced driver picked up after to reduce vehicle vibration time, the speed and unbearable drivers would rather detour through speed bumps, As a result, traditional speed bumps do not bring good results, but bring trouble and greater risk, wasting the convenience of the road.