Intelligent speed bump

This smart speed bump can judge the speed of the car, when the car is less than 30 kilometers per hour, the speed bump will be flat, will not force the car to bump. When the speed of the car is higher than 30 kilometers per hour, the speed bump is raised to punish the driver for speeding. So, as long as you take the initiative to reduce speed, you don't have to endure the bumps brought by speed bumps.