What are the regulations for installing car roof racks?

[FelicityRose]

Different vehicles have different regulations for roof rack installations. For items placed on a roof rack, the height from the ground to the top of the rack must not exceed 4 meters, and the height from the roof to the top of the items must not exceed 0.5 meters. Otherwise, it will be considered over-height and may result in a warning or fine. Below are the installation regulations for different types of vehicles: 1. Heavy-duty and medium-duty trucks, semi-trailers: The height from the ground must not exceed 4 meters, and for container-carrying vehicles, it must not exceed 4.2 meters. 2. Motorcycles: The height from the ground must not exceed 1.5 meters, and the length must not extend beyond the body by more than 0.2 meters. The width of items carried on two-wheel motorcycles must not exceed the handlebars by more than 0.15 meters on either side; for three-wheel motorcycles, the width must not exceed the body. 3. Passenger cars: For items carried on the roof rack of a passenger car, the height from the roof must not exceed 0.5 meters, and the height from the ground must not exceed 4 meters.