The setting of speed bumps will reduce the driver's driving safety and ride comfort expectations, prompting the driver to choose a lower expected speed. Under the guidance of the expected speed, the driver will actively drive the vehicle to approach and pass the speed bump at a lower driving speed. The ideal speed bump should ensure that the vehicle will not lose control when the vehicle passes, and the important safety components will not be broken, and it should have high driving and structural safety. Therefore, the ideal speed bump should have the following characteristics.
1. With the increase of vehicle speed, driving safety can be maintained at a stable level or even improved after it is reduced to a certain level.
2. The ride comfort of the driver is at a high level when the speed is lower than the road speed limit, and when the speed is higher than the road speed limit but lower than 85% of all speeding vehicles, the ride comfort deteriorates rapidly with the increase of the speed. It can maintain a stable low level at 85% of the speed of all speeding vehicles. The effect of the speed bump depends to a large extent on the speed of the vehicle. Therefore, in order to ensure the safety and comfort of drivers, it is necessary to reasonably set the road speed limit and scientifically design the geometric size of the speed bump.

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