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Permits
For copies of permits required by the Weighmaster please visit our permits section .
Axle Loading Information
Normal Loading Maximums
- 18,000 pounds on single axles spaced 9 feet or more apart
- 13,000 pounds on tandem axles spaced 3.5 feet to 9 feet apart
- 9,000 pounds on axles separated by less than 3.5 feet
- 13,000 pounds per axle maximum, tri-axle and multi-axles
Designated Loading
16,000 pounds per axle on one tandem axle assembly.
Seasonal Restriction Loading Maximums
35% Reduction of Normal Loading Per Axle (as follows):
- 11,700 pounds on single axles spaced 9 feet or more apart
- 8,450 pounds on tandem axles spaced 3.5 feet to 9 feet apart
- 5,850 pounds on axles separated by less than 3.5 feet
- 8,450 pounds per axle maximum, tri-axle and multi-axles
- 35 miles per hour maximum speed limit
For more information see CRA Seasonal Weight Restrictions page here
For a video on Seasonal Weight Restrictions click here
All-Season Road Loading Maximums
- 18,000 pounds on single axles spaced 9 feet or more apart
- 16,000 pounds on tandem axles spaced 3.5 feet to 9 feet apart
- Onlyone tandem axle assembly permitted at 32,000 pounds., no other tandem axle assembly shall exceed 26,000 pounds
- 9,000 pounds on axles separated by less than 3.5 feet
- 13,000 pounds per axle maximum, tri-axles and multi-axles
Weight determinations are based on axle configuration in the
Michigan Truck Safety Department publication "Truck Driver's Guidebook"
Historic Frost Law Seasons
Year | Start Date |
End Date |
---|---|---|
1977
|
Feb. 24 |
Unknown |
1978
|
Unknown |
May 1 |
1979
|
Feb. 28 |
April 25 |
1980
|
Unknown | April 23 |
1981
|
Feb. 18 |
April 1 |
1982
|
Feb. 24 |
April 22 |
1983
|
Feb. 21 |
Unknown |
1984
|
Feb. 14 |
Unknown |
1985
|
Feb. 25 |
March 29 |
1986
|
Unknown | April 3 |
1991
|
Feb. 5 |
Unknown |
1995
|
Unknown | April 3 |
1999
|
Unknown | March 22 |
2002
|
Jan. 23 |
March 25 |
2003
|
March 3 |
April 7 |
2004
|
Feb. 26 |
March 29 |
2005
|
Feb. 21 |
April 8 |
2006
|
No Frost Laws |
No Frost Laws |
2007
|
March 1 |
April 2 |
2008
|
Feb. 25 |
April 9 |
2009
|
Feb. 9 |
March 30 |
2010
|
Feb. 26 |
March 24 |
2011
|
Feb. 14 |
April 1 |
2012
|
Feb. 13 |
March 12 |
2013
|
Feb. 25 |
April 8 |
2014
|
March 12 |
April 17 |
2015
|
March 10 |
April 6 |
2016
|
No Frost Laws |
No Frost Laws |
2017
|
No Frost Laws |
No Frost Laws |
2018
|
Feb. 19 |
March 23 |
2019
|
March 11 |
April 1 |
2020
|
No Frost Laws |
No Frost Laws |
2021
|
March 1 | March 22 |
2022
|
March 4 | March 22 |
2023
|
No Frost Laws |
No Frost Laws |
2024
|
Jan 29 | Feb 10* |