Simplify Your Oversize/Overweight Loads

  • Instantly Determine Permit & Escort Costs
  • Calculate Max Legal/Permitted Axle Weights
  • Understand Equipment Limits
See How It Works

Maine Axle Weight Limits

Axle spacings and weight calculator

Max Legal Weight for GVW under 80,000 lbs and Max Permitted Weight for GVW over 80,000 lbs

Vehicle configuration

Maximum Legal Weight Allowed

A permit is required when the gross vehicle weight of a single vehicle or a combination of vehicles exceeds the following legal weight limit established for the vehicle type and axle configuration:


Legal Weight Limit

2-Axle Vehicle

34,000 lbs.

3-Axle Vehicle

54,000 lbs.

4-Axle Vehicle

69,000 lbs.

5 or More Axle Vehicle

69,000 lbs.*

3-Axle Combination of Vehicles

54,000 lbs.

4-Axle Combination of Vehicles

69,000 lbs.

5-Axle Combination of Vehicles

80,000 lbs.

6-Axle Combination of Vehicles

100,000 lbs.**

* Except as provided by Title 29-A M.R.S.A. §2364.

**100,000 lbs. is legal on 6 or more axles consisting of a minimum of a 3-axle truck tractor in combination with a tri-axle semitrailer on General Law Highways. The Maine Interstate System is restricted to 80,000 lbs. except that a combination vehicle consisting of a 3-axle truck tractor and a tri-axle semitrailer may operate up to 100,000 lbs. for as long as a federal law exempting Maine from the 80,000 lbs. interstate limit is in effect.

Maximum Permit Weight Allowed

The maximum weights for which a permit may be granted, without a special and detailed review by the Maine Department of Transportation, are as follows:


Legal Weight Limit

2-Axle Vehicle

39,100 lbs.

3-Axle Vehicle

62,100 lbs.

4-Axle Truck

73,000 lbs.

4-Axle or more Special Mobile


110,000 lbs.

4-Axle Truck Tractor-Semitrailer

120,000 lbs.

5-Axle Truck Tractor-Semitrailer

130,000 lbs.

6-Axle Truck Tractor-Semitrailer

140,000 lbs.

7-Axle Truck Tractor-Semitrailer

159,000 lbs. to 167,000 lbs. **

8-Axle Truck Tractor-Semitrailer

177,000 lbs.

** Axle Group Limits

1st Axle

12,000 lbs. (20,000 lbs. for 167,000 lbs.)

2nd, 3rd, and 4th Axles

26,000 lbs. (Combined Weight Max. 72,000 lbs.)

5th, 6th, and 7th Axles

27,000 lbs. (Combined Weight Max. 75,000 lbs.)

  1. There is an additional 3% tolerance on any axle or group of axles.
  2. Weights in excess of the above are considered extreme loads and may require detailed engineering reviews. An applicant should allow a minimum of two business days for the Maine Department of Transportation to complete a required review. The applicant may be required to supply additional information not on the application (such as an axle weight and spacing diagram).

Source of information: