What is the national standard for the height of speed bumps?

[SanEllie]

There is no national standard issued regarding speed bumps. Below is relevant information: 1. Standard: Manufacturers of speed bumps follow a relatively unified standard during production. The width of a speed bump should not exceed 30 cm, and the thickness (height) should not exceed 5 cm. Depending on the width of the road, there are two lengths: 25 cm and 1 m. The body of the speed bump should be covered with black and yellow stripes to distinguish it from the road surface. Speed bumps are only installed on highways. 2. Speed control: For roads with a speed limit below 40 km/h, a speed bump width of 400–500 mm can effectively control vehicle speed. For roads with a speed limit below 60 km/h, a speed bump width of 500–600 mm is required for effective speed control.