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Montana vs Wyoming: oversize rules side by side

A move that crosses from Montana into Wyoming needs two permits and follows the stricter rule wherever they differ. 7 of 22 rules differ, highlighted below.

Updated October 2026 · From FreightDeck's audit of state regulations · Compare any two states

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RuleMontanaWyoming
Legal limits
Legal width8 ft 6 in8 ft 6 in
Legal height14 ft14 ft
Legal length (combination)75 ft75 ft
Legal gross weight80,000 lbs80,000 lbs
Escorts and surveys
One escort at (width)12 ft 6 in14 ft
Two escorts at (width)16 ft 6 in14 ft
Pole car at (height)17 ft17 ft
Police escort at (width)——
Route survey at (height)17 ft17 ft
Route survey at (width)20 ft18 ft
Superload thresholds
Superload width18 ft18 ft
Superload height17 ft17 ft
Superload length150 ft120 ft
Superload weight100,000 lbs160,000 lbs
Travel windows
Night travelDaylight onlyDaylight only
Weekend travelAllowedAllowed
Holiday blackouts6 holidays6 holidays
Overhang
Rear overhang allowed4 ft4 ft
Front overhang allowed——
Permits
Routine permit lead time~1 day~1 day
Superload lead time~5 days~3 days
Permit valid for5 days4 days

Highlighted cells differ. "Per permit" means the state sets the rule on the permit rather than publishing a fixed limit. Escort triggers are the width or height above which the requirement applies.

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