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Montana Frost Laws, Seasonal Load Weight and Speed Restrictions – 2024

Montana frost laws and spring road restrictions for 2024.

March 19, 2024, 1:40 PM

NOTICE IS HEREBY GIVEN THAT, in accordance with the provisions of Section 61-10-128, MCA, the following sections of public highway are or will be, limited or otherwise restricted to traffic for certain classes of vehicles for an indeterminate period from the effective date of this order. Proper authority will remove these restrictions when road and weather conditions permit.

THIS ORDER shall cancel and supersede any previous order in conflict herewith provided; however, this order shall not supersede any restrictions now in force covering bridges upon the section of highway concerned. No notice will be issued if restrictions remain unchanged.

CREDIT for tires will be based on nominal tire markings.

Important Notes:

NO Overweight Permits are to be issued on highways with load or speed restrictions. The 10% allowance provision of 61-10-144 MCA is not allowed (see policy for exceptions).

ALL SPEEDS will be limited to MAXIMUM LEGAL SPEED or a lower rate of speed as posted in areas where speed restrictions are imposed. Strict compliance with speed restrictions will be enforced. Six hundred pounds per inch width of tire will be allowed on the front axle, regardless of the seasonal load limit.

Load Restrictions

The load limit for the single axle is 8 tons, and for the tandem axle, it is 16 tons. The tire's load limit is 400 lbs per inch of width. However, the weight will never exceed 16000 lbs per single axle and 32000 lbs per tandem axle. The speed limit is as posted.

Further detailed information regarding these restrictions, including specific highways, may be obtained from the Helena Maintenance Office of The Montana Department of Transportation by phoning (406)444-6372.

Montana Travel Conditions - Load and Speed Restrictions:

http://www.mdt.mt.gov/travinfo/restrictions.shtml

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