DOT & MONTANA STATE WEIGHT LIMITS
Gross Weight
80,000 lbs on the Interstate System
Single Axle
20,000 lbs
Tandem Axle
34,000 lbs
Other State Provisions & Exemptions
- Combinations hauling divisible loads can have a GVW of up to 131,060 lbs provided they have proper axle distancing and meet the Federal Bridge Formula.
- Transport companies complying with the Montana/Alberta Memorandum of Understanding are permitted a GVW of up to 137,800 lbs in a B-Train configuration on the I-15 stretch between Shelby, Montana, and the Canadian border.
- Non-steering axle weight should not exceed 500 lbs per inch of tire width.
- Vehicles with idle reduction technology are permitted axle, vehicle, or bridge formula weights of up to 400 lbs over the limit.
The information provided here is not comprehensive and may not reflect the most recent state limits. Additional codes, regulations, and exemptions may apply. Please visit the Montana DOT website for current information.
CASE IH 2388
From: Havre, MT 59501
To: Townsend, MT 59644
Dimensions: 23’7″ L x 11’6″ W x 12’6″ H
Weight: 28,329 lbs
KAWASAKI MULE PRO FX RANCH
From: Miles City, MT 59301
To: Coulee City, WA 99115
Dimensions: 11’4″ L x 5’4″ W x 6’8″ H
Weight: 1,863 lbs
KOMATSU PC220 LC-6L
From: Central Point, OR 97502
To: Thompson Falls, MT 59873
Dimensions: 32’1″ L x 10’6″ W x 9’6″ H
Weight: 51,765 lbs
Equipment & Machinery
Freight
Container
Livestock
Commodities