Wyoming Department of Transportation

Overweight / Size Permits

Size and Weight

Size and Weight Limits  - Wyoming Constitution title 31 chapter 18 - Commercial Vehicle weight limits.

Size and Weight Restrictions  - This links directly to the Wyoming Road Report / Width Restrictions information.

Width: 8 1/2 ft.

Height: 14 ft.

Length: 60 ft - single unit, or semi-trailer in a truck-tractor semi-trailer combination 81 ft - semi-trailer, trailer combined length in truck-tractor, semi-trailer, trailer combination including connecting mechanism
(48 ft. - maximum for semi-trailer)
(40 ft. - maximum for trailer)
The heavier towed vehicle shall be directly behind the truck-tractor the truck_tractor and the light towed vehicle shall be last if the weight difference between consecutive towed vehicles exceeds five 5000 lbs.
85 ft. - any combination of vehicles other than those listed above. No combination of vehicles shall consist of more than 3 single vehicles.

Single axle: 20,000 lbs.

Tandem axle: 36,000 lbs.

Triple axle: 42,000 lbs.

or three or more axles used on bridges measuring more than 8 1/2 feet refer to Table I.

Each wheel: 10,000 lbs.

Each tire: 700 lbs. per inch of width on steering tires, 600 lbs. per inch of width on other tires.
Gross weight:

Interstate - 117,000 lbs. - Table I by formula

Primary & Secondary - 117,000 lbs. - Table I by formula

Primary & Secondary - 80,000 lbs. - Table II For more information regarding size and weight click the size and weight limits link above and refer to Wyoming Statutes 31-18-802.


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