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Effective noon today, April 2, the Michigan Department of Transportation lifts spring weight restrictions on state roads from the southern Michigan border north to the Mackinac Bridge.

Frost restrictions are still in effect for all state trunkline highways north of the Mackinac Bridge. State routes typically carry M, I, or US designations.

On March 16, Gov. Gretchen Whitmer signed an executive order temporarily lifting seasonal weight and other delivery-related restrictions for vehicles on state and local roads carrying essential supplies to mitigate the spread of the COVID-19 coronavirus. The executive order extends until 11:59 p.m. Monday, April 13. This spring weight restriction update does not alter the direction given in the governor’s order. Permits will still be required for loads exceeding the normal legal limits.

In areas with seasonal weight restrictions still in effect, MDOT says the following apply:

• On routes designated as “all-season” (designated in green and gold on the MDOT Truck Operators Map), there will be no reduction in legal axle weights.
• On routes designated as “seasonal” (designated in solid or dashed red on the MDOT Truck Operators Map), there will be a posted weight reduction of 25 percent for rigid (concrete) pavements and 35 percent for flexible (asphalt) pavements.
• All extended permits will be valid for oversize loads in the weight-restricted area on the restricted routes. Single-trip permits will not be issued for any overweight loads or loads exceeding 14 feet in width, 11 axles and 150 feet in overall length on the restricted routes.

MDOT reminds truckers county road commissions and city public works departments can put in place their own seasonal weight restrictions, which usually, but not always, coincide with state highway weight restrictions. Signs are generally posted to indicate which routes have weight restrictions in effect, according to the agency.

For weight restriction information and updates, call 800-787-8960, or you can access this information on MDOT’s website at www.Michigan.gov/Truckers, under “Restrictions.”

All-season routes are designated in green and gold on the MDOT Truck Operators Map, which is available online. You also may sign up to receive e-mail alerts.

Trucking companies located in New Jersey and Canada can obtain information by calling 517-373-6256.