The role of speed bumps.

Speed bumps, also known as speed bumps, are traffic facilities installed on highways to slow passing vehicles. The shape is generally strip-like, but also point-like; the material is mainly rubber, but also metal; generally yellow and black to attract visual attention, so that the road is slightly arched to achieve the purpose of vehicle deceleration. It is generally set up in highway crossings, industrial and mining enterprises, schools, and residential areas where vehicles need to slow down and sections that are prone to traffic accidents.