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.

                                                          

    So, how do the speed humps reach the goal of deceleration?
    Speed humps on the highway are designed to make vehicles slow down and affect drivers' driving psychology by slightly arching the road surface. When a car passes through a speed hump at high speed, the violent vibration will be transmitted from the tire to the driver through the bodywork and the seat. The vertical curve can generate an abrupt acceleration, creating solid physiological stimulation (including vibration and visual stimulation) and psychological stimulation. The physiological stimulation causes the driver to have a strong sense of discomfort. In contrast, the psychological motivation deepens the driver's insecurity and further reduces the driver's sense of safety in the road environment.
     Usually, the greater the driver's perception of discomfort, the less safe the vehicle driving, that is, the less safe the driver feels. Therefore, setting speed bumps will reduce the driver's expectation of driving safety and riding comfort, prompting the driver to choose a lower expected speed. Under the guidance of the expected pace, the driver will actively drive the car approaching and passing the speed hump at a lower driving speed.
In daily life, many drivers think that the car Obliquely crosses the speed hump, and the level of body vibration is slight so that damage will be relatively small. When the car body passes obliquely, the swing range is frequent, quickly leading to uneven force on the left and right suspension and damage to the suspension system.
     When you meet a speed hump, the best way to drive is to slow down early and then forward through the speed hump to balance the impact on both sides of the tire—the left and right sides of the suspension system balance stress. And the damage to cars is minimized. The setting of the speed hump is to reduce the vehicle's speed to ensure driving safety. If you choose to pass quickly, it is harmful to the car. So we should slow down when we cross and glide through the speed humps, not step on the brake or pass at high speed.