Load & Speed Restrictions

April 26, 2025 4:20 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. These restrictions will be removed by proper authority at such a time as 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 to a lower rate of speed as posted in areas where speed restrictions are imposed. Strict compliance with speed restrictions will be enforced. 600 pounds per inch width of tire will be allowed on the front axle, regardless of the seasonal load limit in effect.

Load Restrictions:

S-261: Mile Marker 27
Effective September 03, 2021 5:38 PM
Long term weight restriction on S-261 from mile post 13.61 to 27, north of Wibaux. This restriction only applies to the county-maintained portion of this road.
Single-Axle Load Limit 8 ton, Limit per Inch Tire Width 400 lbs, Tandem-Axle Load Limit 16 ton
S-261: Mile Marker 13.61
Effective September 03, 2021 4:38 PM
Long term weight restriction on S-261 from mile post 13.61 to 27, north of Wibaux. This restriction only applies to the county-maintained portion of this road.
Single-Axle Load Limit 8 ton, Tandem-Axle Load Limit 16 ton, Limit per Inch Tire Width 400 lbs
S-323: Mile Marker 0 to 70.9
Effective September 03, 2021 12:33 PM
Ekalaka to Alzada -- Weight Restriction until further notice.
Tandem-Axle Load Limit 16 ton, Limit per Inch Tire Width 400 lbs, Single-Axle Load Limit 8 ton

Speed Limit Restrictions:

US-2: Mile Marker 11.6
Effective March 06, 2024 1:58 PM
Effective 3/7/2024: NO OVERWEIGHT LOADS. Loads over legal weight, including permitted loads are prohibited until further notice. Location: US-2 Bridge over Kootenai River at mile post 11.6. This bridge is approximately two miles northwest of Troy, MT.
Speed Limit 70 mph
MT-86: Mile Marker 19 to 37.65
Effective March 10, 2025 3:29 PM
MT Highway 86: 11-ton weight limit on Cache Creek (MP 24.3) and Flathead Creek (MP 28.1) bridges until further notice. Loads over 11 tons must use an alternate route.
Speed Limit 60 mph

Information:

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