Seasonal Weight Restrictions

Seasonal Weight Restrictions will be SUSPENDED effective 6 a.m. March 23, 2016.

Road damage caused by heavy vehicles during winter and spring thawing periods is a problem that affects all northern states. Unless a roadway has been designed and constructed for heavy vehicle loads year-round and designated to be an ALL-SEASON ROAD, a significant loss of strength occurs during a seasonal thaw period.

The damage to a road is directly related to the amount and frequency of the loading applied. Michigan law provides that the months of March, April and May are automatically reduced loading months, but the statute also allows the Michigan Department of Transportation and county road commissions to implement those restrictions earlier, or suspend reduced loading, depending upon the weather and road conditions.

Along with reduced loading provisions are reduced speeds. For vehicles over 10,000 poundsoperated on seasonally restricted roads, the speed limit drops to a maximum of 35 mph, regardless of the posted limit. Speed, in conjunction with axle and wheel loading, contributes to road damage including the creation of potholes.

Most of the roadways in Washtenaw County are seasonally restricted.  For further information, please refer to the current WCRC Truck Operator’s Map or contact the Permits Office at (734) 327-6642. 

County Normal Routes
County Designated (All-Season) Routes

Media Advisory- Seasonal Weight Restrictions Imposed
Media Advisory- Seasonal Weight Restrictions to be Suspended


Michigan Center for Truck Safety
The Michigan Center for Truck Safety is a non-profit organization dedicated to increasing highway safety through safer truck travel. 

CRAM Seasonal Weight Restrictions
Seasonal weight restrictions were enacted in order to help minimize the impact of heavy trucks on Michigan's roads during the Spring cycle of freezing and thawing. By law, road agencies can enact weight restrictions on roads that are not designated as all-season routes when conditions merit.