Before 1997, only foreign companies produced and sold rubber speed humps equipped with reflective beads. It also has a nickname abroad, “the lying policeman,” which means that vehicles will slow down as they see the police when passing it. At that time, domestic speed humps were mainly made of cement and cast iron. However, rubber speed hump has a high ability of flexibility and shock-absorbing, and the feeling of turbulence is not strong when cars move on it. It is eye-catching to see the black and yellow speed humps during the day and the reflecting light of reflective beads at night. It is easy to install and maintain. Later, many rubber factories began to produce this style of speed hump nationwide. Nowadays, with the popularity of private cars, speed humps have also been everywhere. As one of the traffic facilities, speed humps are installed on highways to slow down passing vehicles. Usually, the shape is a strip or massive. And they are chiefly made of rubber. They are drawing the driver’s attention visually with black and yellow so that the road surface is slightly arched to achieve the purpose of vehicle deceleration. They are generally set at road crossings, industrial and mining enterprises, schools, residential entrances, and other stretches of roads where vehicles need to slow down and traffic accidents are frequent. It is also a new type of particular traffic safety device used to slow the speed of the motor and non-motor vehicles. Qualified speed humps must ensure that vehicles will not be out of control when passing them. An essential safety component will not break or be in other dangerous situations. They should be safe on driving and structural, and it is also one of the most critical standards for grading speed humps on the market.
