Montana state DOT shipping regulations, limitations, rules and laws for the trucking of oversize and over weight loads over the roads and highways in the state of Montana.

Montana DOT regulations

The great state of Montana official seal.

Montana State Trucking Permit Regulations – oversize shipping and transport.

Montana State Trucking information website:

Legal Loads.
Length: 75’ overall
Weight: GVW 80,000 lbs.
Steer: 20,000 lbs.
Width: 8’ 6”
Height: 14’


Routine oversize shipping, trucking and transport permits.
Length: 110’
Weight: 100,000 lbs.
Width: 18’
Height: up to 17’ depending on the route chosen.

How to apply for Permits.
Montana Department of Transportation
Permits are valid for 3 days.  The basic fee is $10.00

Pilot car – escort vehicle requirements.
Width: Two lanes over 12′ one pilot car or escort vehicle in front.
Two lanes over 14′ one pilot car or escort vehicle in front and one pilot car or escort vehicle in the rear.
Four lanes 14′ to 18′ one pilot car or escort in the rear.
Height:  Not Specified; Up to company because they are
responsible for all structures.
Length:  Two lanes over 105′ one pilto car or escort vehicle in the rear. Four lanes over 120’ only requires one pilot car or escort vehicle in the rear.

Travel Restrictions.
Travel is permitted sunrise to sunset Monday thru Friday.

The information contained in these pages is research information primarily for use by oversize and overweight trucking company drivers, dispatchers and pilot car companies. While every effort is put into maintaining the accuracy of this information you must absolutely verify this information with the Montata State DOT Permits office before commencing movement.




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