Administrative Rules of Montana
Department 18 - TRANSPORTATION
Chapter 18.8 - MOTOR CARRIER SERVICES DIVISION
Subchapter 18.8.4 - Gross Vehicle Weight Fees
Rule 18.8.431 - MAXIMUM ALLOWABLE WEIGHT

(1) The maximum allowable gross weight for vehicle combinations hauling divisible loads is 131,060 pounds. Vehicles and vehicle combinations hauling divisible loads must comply with the federal bridge formula found in 61-10-107, MCA, unless otherwise provided for in statute, federal regulations or department rules.

(2) Maximum allowable weights allowed for vehicle combinations hauling divisible loads on highways cannot exceed a gross vehicle weight and single or tandem weights as described in 23 CFR 658, Appendix C, April 1, 2015 edition.

(3) The maximum allowable gross weight for vehicle combinations hauling divisible loads on the federal interstate system and operating under the provisions of 23 CFR 658, Appendix C, April 1, 2015 edition, or operating under 61-10-107(1)(b), MCA, on non-interstate highways is:

(4) For vehicles being operated under the Montana/ Alberta MOU, operations must have paid gross vehicle weight fees for the total weight being carried.

(5) Permits may be issued for the weights in 23 CFR 658, Appendix C, April 1, 2015 edition, for the same permit types and under the same fee schedule provided in 61-10-125, MCA and ARM Title 18, chapter 8, subchapter 6.

(6) The maximum allowable weight for a mobile home for licensing purposes is the bridge formula in 61-10-107, MCA. A mobile home with any additional weight must obtain an excess axle weight permit as per 61-10-125, MCA.

(7) Copies of the CFR regulations may be obtained at www.gpo.gov.