Width: 8'6"
Height: 14'
Length: 53' Semi-Trailer
Overall Combination: 75'
GVW: 80,000 lbs
OS/OW Permit: 3–5 Days
Superload Permit: 1–3 Days
IRP Trip Permit: 72 Hours
IFTA Temporary Permit: 30 Days
Fuel Trip Permit: 72 Hours
Continuous: Up to 10' Wide
15'6" High
110' Long
Daylight: Sunrise - Sunset (Red Routes)
Restricted Loads: DW21 & 5 MPH – Daylight Only
Width over 12'6"
Length over 110'
Height over 17'
Superloads and heavy tridem axle weights
Route-specific requirements
Montana Oversize and Overweight Permits are required whenever a vehicle or load exceeds Montana's legal size or weight limits while operating on public highways. These permits ensure safe transportation, protect public infrastructure, and maintain compliance with Montana Department of Transportation (MDT) regulations.
Chicago Permit provides fast and affordable Montana Oversize Permits, Overweight Permits, Single Trip Permits, Annual Permits, Superload Permits, Temporary Registration Permits, IRP Trip Permits, IFTA Fuel Permits, and Overhang Permits. Our permit specialists help carriers remain compliant while moving oversize and heavy-haul loads throughout Montana.
| LENGTH | WIDTH | HEIGHT | GROSS WEIGHT |
|---|---|---|---|
| 53' Trailer 75' Overall | 8'6" Maximum Legal Width | 14 Feet (Statewide) | 80,000 Pounds |
Montana oversize permits can be obtained online through our website chicagopermit.net or by calling us at 270-908-9656
The cost of an oversize permit in Montana typically starts around $10 per trip, depending on the dimensions, weight, and route. Additional fees may apply for escorts or special handling.
Montana requires oversize permits for vehicles exceeding standard dimensions: width over 8’6”, height over 14’, and length over 75’ (depending on vehicle type). Travel is generally permitted during daylight hours unless otherwise specified. Escorts, lighting, and signage may be required.
Yes, Montana requires trip permits for commercial vehicles operating without current registration in the state. This includes one-time travel through Montana or temporary operations.
Montana oversize permits can be obtained online through our website chicagopermit.net or by calling us at 270-908-9656
The standard legal load limits in Montana are:
Width: 8 feet 6 inches
Height: 14 feet
Length: Varies (typically up to 75 feet overall for combination vehicles)
Weight: 80,000 pounds gross vehicle weight
Loads exceeding these limits require oversize/overweight permits.
Overweight permits in Montana vary based on weight and distance traveled. Fees can range from $10 to several hundred dollars.
You can log in to manage your Montana oversize permit through Our website chicagopermit.net
While basic oversize permits may cost as low as $10, the total cost depends on the load’s size and routing. Additional charges apply for over-dimension combinations or extended mileage.
Montana enforces seasonal load restrictions, especially during spring thaw (typically March to May), when certain roads are more susceptible to damage. Weight limits may be reduced on affected routes.
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We provide fast and reliable permit solutions with expert support, helping carriers stay compliant and keep every load moving on schedule.
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