169.733 Wheel flaps on truck and trailer.
Subdivision 1. Vehicles generally. Every truck, truck-tractor, trailer, semitrailer, pole trailer, and rear-end dump truck, excepting rear-end dump farm trucks and military vehicles of the United States, shall be provided with wheel flaps or other suitable protection above and behind the rearmost wheels of the vehicle or combination of vehicles to prevent, as far as practicable, such wheels from throwing dirt, water, or other materials on the windshields of vehicles which follow. Such flaps or protectors shall be at least as wide as the tires they are protecting and shall have a ground clearance of not more than one-fifth of the horizontal distance from the center of the rearmost axle to the flap under any conditions of loading or operation of the motor vehicle.
Subd. 2. Vehicle with conveyor belt. For a dump truck or truck with a rigid box fastened to its frame and having a conveyor belt or chain in the bottom of the vehicle which moves the cargo to the rear end of the vehicle, the flaps shall be mounted as far to the rear of the vehicle as practicable and shall have a ground clearance of not more than 18 inches when the vehicle is loaded.
Subd. 3. Bottom-dump vehicle. A bottom-dump cargo vehicle transporting sand, gravel, aggregate, dirt, lime rock, silica, or similar material must be equipped with flaps that are mounted to the rear of the axles, cover the entire width of the vehicle, and have a ground clearance of six inches or less when the vehicle is fully loaded.
Subd. 4. Alternative requirements. If the motor vehicle is so designed and constructed that the above requirements are accomplished by means of body construction or other means of enclosure, then no such protectors or flaps shall be required.
Subd. 5. Extended flaps. If the rear wheels are not covered at the top by fenders, body or other parts of the vehicle, the flap or other protective means shall be extended at least to a point directly above the center of the rearmost axle.
Subd. 6. Lamps or wiring. Lamps or wiring shall not be attached to fender flaps.
Official Publication of the State of Minnesota
Revisor of Statutes