The speed bumps are installed on the asphalt pavement: 1. Arrange the speed bumps neatly into a straight line (black and yellow), and place a semicircular row end at each end. 2. Use a percussion drill to install a 10mm drill bit to drill a hole vertically at each installation hole of the speed reducer, with a depth of 150mm. 3. Fix it with a long nail with a length of 150mm and a diameter of 12mm.