A.R.S. Section 28-958.01 sets forth Arizona's mud flap law:
28-958.01. Rear fender splash guards
A. A person shall not operate a truck, trailer, semitrailer or bus on a highway unless the vehicle is equipped with rear fender splash guards that comply with the specifications provided in this section.
B. The splash guards:
1. Shall be attached in a manner that prevents the splashing of mud or water on the windshield of other motor vehicles.
2. Shall extend to a length of not more than eight inches from the ground.
3. Shall be wide enough to cover the full tread or treads of the tires being protected.
4. Shall be installed close enough to the tread surface of the tire or wheel to control the side throw of the bulk of the thrown road surface material.
5. May be constructed of a flexible rubberized material.
6. Shall be attached in a manner that, regardless of movement either in the splash guards or the vehicle, the splash guards retain their general parallel relationship to the tread surface of the tire or wheel under all ordinary operating conditions.
C. This section does not apply to:
1. A vehicle commonly known as a pickup truck with a manufacturer's rating of three-quarter ton or less, except that this section applies if the pickup truck has been modified from the original bumper height design to raise the center of gravity of the pickup truck.
2. A truck tractor or converter dolly when used in combination with another vehicle.
3. A single axle trailer with fenders wide enough to cover the full tread or treads of the tires being protected and that extend to a length of not more than fourteen inches from the ground.
If you or your property has suffered damages as a result of someone's violation of this law, you may have a claim for negligence per se. Harper Law PLC can help you pursue your claim. Please give us a call and schedule a consultation today.