Michigan adjusts weight restrictions on some highways effective today

Map of Michigan with highway restrictions
Michigan DOT

The Michigan Department of Transportation continues to adjust spring weight restriction areas in an annual move to protect roads.

Effective noon today, March 20, weight restrictions will be lifted on all state trunkline highways from the southern Michigan border north to and including the route beginning on M-43 at the I-196 Business Loop intersection in South Haven continuing to the US-131 interchange in Kalamazoo County, then south on US-131 to the I-94 interchange, east on I-94 to the I-69 interchange in Calhoun County, north on I-69 to the I-96 interchange in Eaton County, east on I-96 to the M-59 interchange in Livingston County, and then east on M-59, ending at the I-94 interchange in Macomb County.

Frost restrictions are still in effect for the remainder of the state and will be imposed and enforced on all state trunkline highways north of the route detailed above. State routes typically carry M, I, or US designations.

In the restricted areas, the following will 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.
  • 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.
  • 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, and maximum speed of 35 mph for some vehicles.

Drivers must follow the speed limits for weight restricted roads, per state law. Go online for speed restrictions for trucks and the rules for propane fuel delivery and public utility vehicles.

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. 

Map of MichiganMichigan DOT

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