Montana Trailer Laws
& Trailer Regulations
Montana's
laws and regulations for trailers are listed below:  Montana
Trailer Brake Laws
All trailers and pole trailers with a Gross Vehicle Weight (GVW) of 3,000 lbs. or greater must be equipped with brakes acting on wheels. All trailers and pole trailers with a GVW of less than 3,000 lbs. must be equipped with brakes on all wheels if the total weight of the trailer or trailers does not exceed 40% of the GVW of the towing vehicle. Every trailer and pole trailer equipped with air- or vacuum-actuated brakes and every trailer and pole trailer with a GVW in excess of 3,000 lbs. must be equipped with brakes acting on all wheels that are designed to be applied automatically and promptly, and remain applied for at least 15 minutes upon breakaway from the towing vehicle. A towing vehicle and all trailers being towed must have 1 control device that can be used to operate all service brakes.
Montana
Trailer Dimension Laws
Total length: 65 feet; trailer length: not specified; width: 102 inches; height: 14 feet. Passenger vehicles less than 2,000 lbs. GVW may tow 1 trailer; this combination shall not exceed 65 feet. Three-unit combinations shall not exceed 65 feet. Three-unit combinations permitted if rear unit is equipped with breakaway brakes.
Montana
Trailer Hitch and Signal Laws
A trailer or pole trailer with GVW of 3,000 lbs. or less must be equipped with a steel safety chain or cable with a minimum diameter of 1/4 inch must be securely fastened to the towing unit. The safety chain or cable may not be connected to the ball but must be connected to the hitch or other frame member of the towing vehicle to prevent the drawbar from dropping to the ground if the ball, socket, or coupler fails.
Montana Trailer Lighting
Laws
A trailer with a GVW in excess of 3,000 lbs. must be equipped with: (1) 2 clearance lamps on the front, 1 at each side; (2) 2 side marker lamps and 2 side reflectors, 1 at or near the front and 1 at or near the rear; and (3) 2 clearance lamps and 2 reflectors on the rear, 1 at each side.
A pole trailer with a GVW in excess of 3,000 lbs. must be equipped with (1) on each side, 1 side marker lamp and 1 clearance lamp that may be in combination, to show to the front, side, and rear; and (2) on the rear of the pole trailer or load, 2 reflectors, 1 at each side.
A trailer or pole trailer with GVW of 3,000 lbs. or less must be equipped with 2 rear reflectors and 2 stop lights, 1 on each side.
Montana
Trailer Mirror Laws
A motor vehicle must be equipped with a mirror that reflects to the driver a view of the highway for a distance of at least 200 feet to the rear of the motor vehicle.
Montana
Trailer Speed Limit Laws
As posted.
Montana Trailer Towing
Laws
N/A.
Disclaimer:
The United States Trailer Laws and Regulations by State by
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