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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
- Only one 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 |