Mississippi Truck Mud Flap Law

What Mississippi makes you run

Mississippi ties clearance to geometry, not inches. Trucks, tractors, trailers and buses over ten tons gross must carry metal protectors or flexible flaps behind the rearmost wheels (63-7-73). The gap can't exceed one-fifth of the distance from the rear axle's center to the flap's center, measured under any load, and the flap must be as wide as the tire. Pole trailers, dump trucks and F-tag trucks are exempt. Roadside it's a fix-it citation, roughly $25 first offense, not an out-of-service.

Coverage and clearance

• Required: Yes
• Coverage: At least as wide as the tires they protect; required on vehicles over ten tons gross weight (63-7-73).
• Ground clearance: Ground clearance no more than one-fifth of the distance from the center of the rearmost axle to the center of the flaps, under any conditions of loading (63-7-73). If the wheel top is not covered by fender or body, the flap must extend up to a point directly above the rearmost axle.
• Fine: Up to $25 for a first offense, up to $100 for a second (63-7-73); correctable equipment violation.

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