Montana Frost Laws, Seasonal Load Weight and Speed Restrictions – 2019

Load and Speed Restrictions were issued February 02, 2018 at 03:08 PM. Load Restrictions: Road limit single axle 8 tons, tandem axle 16 tons, 400 lb. per inch width of tire. However, at no time will the weight exceed 16000 lb. per single axle and 32000 lb. per tandem axle. Speed limit as posted. Specific roads are listed on the site below.

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:

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