When i drive across speed bumps on the street, my car always gives out loud noises "bang bang!!" I know they installed speed bumps on the road to reduce our driving speed and keep us safer. But each time when my car "bangs", i feel so frustrated.

I've observed the speed bumps on the street for a long time. On many roads, the rubber speed bump is in a poor condition, with exposed nails seriously threatening traffic safety. Why?


In both sides of speed bump, there are small holes used for fixing with expansion screws. Theses holes are at the top pressure-position when vehicle passes by the speed bump, making the speed bump brushed off and steel nails exposed.


You can clearly see from the street that the nails of the speed bumps are ready to prick through wheels like steel pins. Jerry-building using recycled rubber or adding a large number of low-cost additives causes the material strength to decline significantly.

I don't hope to see speed bumps become tire-killers, but be the "guard" of saving life. There must be some solutions on this problem.

Yes, there do be some solutions on this matter.

(1) Use natural rubber in stead of recycled rubber. No low-cost additives.

(2) Connection holes lined with steel plate, and connected to each other.

During the rubber vulcanization process, place a steel plate inside the speed bump and connect the two holes, so that the fixing expansion screws will not only get through holes but also steel plate. In this case, connection is strengthened.

(There are small holes in steel plate which is in the same positions as the fixing holes)

(3)Add strengthen-line inside the structure.

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