Commercial Vehicles

New postings

  • 10 Ton bridge weight limit posted on Glendora Road, west of Cleveland Avenue.
  • 5 Ton weight limit over culvert on Prairie Road, north of Red Arrow Hwy.
  • 5 Ton weight limit over culvert on Holden Road, south of Snow Road

Permit

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

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 Season Periods

  1. 1970s
  2. 1980s
  3. 1990s
  4. 2000s
  5. 2010s
Year Date
1977 February 24th to ?
1978 ? to May 1st
1979 February 28th to April 25th