According to the effect of the speed reduction belt in recent years, the speed reduction belt is a double-edged sword: scientifically setting the speed reduction belt can effectively improve the road traffic safety situation. On the contrary, it may have little effect or even become a man-made roadblock on the highway. In order for the speed reduction belt to play an effective role, we must pay attention to the following principles when formulating specific implementation plans:
1. The principle of pertinence, that is, it must analyze and determine the type, shape, size, material, and connection and installation of speed bumps according to specific conditions such as road grade, traffic flow structure, actual average speed, road alignment, and pavement materials.
2. The principle of uniformity. The location and number of speed reduction belts must be based on research or actual road tests.
3. The principle of matching, speeding belts with large coercive force must be used in conjunction with other traffic safety facilities (hint signs, markings, etc.) to ensure the safety and efficiency of use.
 The content of the speed reduction belt is briefly introduced here. Everything has two sides. When setting up the speed reduction belt, we try to play the maximum role of the speed reduction belt and reduce its negative effects in accordance with the above principles.

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