Maine Truck Mud Flap Law
Maine requires every truck, truck tractor, trailer and semitrailer to run guards that cut the spray or splash of mud, water or slush from the rear wheels (29-A M.R.S. 1953). No inch clearance or width number is set. Trucks at or under 6,000 lb, bobtail tractors, fire trucks, fendered vehicles, certain dump trucks and long stake bodies are exempt. It's a traffic infraction. Roadside, an officer checks the flap is present and effective, not a precise dimension.
What Maine makes you run
Maine requires every truck, truck tractor, trailer and semitrailer to run guards that cut the spray or splash of mud, water or slush from the rear wheels (29-A M.R.S. 1953). No inch clearance or width number is set. Trucks at or under 6,000 lb, bobtail tractors, fire trucks, fendered vehicles, certain dump trucks and long stake bodies are exempt. It's a traffic infraction. Roadside, an officer checks the flap is present and effective, not a precise dimension.
Coverage and clearance
- Required: Yes
- Coverage: Guards must cut the spray or splash of mud, water or slush from the rear wheels; no explicit width number.
- Ground clearance: No set clearance. The statute requires guards that effectively reduce rear spray and splash (29-A M.R.S. 1953); no inch figure.
- Fine: Traffic infraction; a fine, generally a correctable equipment ticket.
Maine Mud Flap FAQ
Are mud flaps required on trucks in Maine?
How low can mud flaps hang in Maine?
What is the mud-flap fine in Maine?
Reference information for planning, not legal advice. Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it. Last reviewed July 2026. Source: https://legislature.maine.gov/statutes/29-A/title29-Asec1953.html. See our Terms & Disclaimer.
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