Michigan – Weight Restrictions

Updated Spring Weight Restrictions Bulletin List:

See the attached for MDOT Sping Weight Restriction Bulletin #1 Information.
Currently, there are no spring weight restrictions active for state trunkline highways.
However, the Michigan Department of Transportation has initiated efforts to begin monitoring spring frost.

Please take the necessary precautions to ensure your transporting operations are accomplished prior to the weight restrictions being imposed.

Although no one can predict when the restrictions will be imposed, you can review when they were imposed in previous years by accessing the web at: http://www.michigan.gov/truckers and clicking on “MDOT Spring Weight Restrictions.” This website also provides detailed weight restriction information.

The current weight restriction status can also be obtained by calling MDOT’s toll-free number at: (800) 787-8960.

When the restrictions are imposed, the following will apply in the restricted area:

– On routes designated as “All Season Routes” (green and gold on MDOT Truck Operator’s Map), there will be no reduction in legal axle weights.

– On routes designated as “Seasonal” (solid or dashed red on the MDOT Trucker Operator’s Map), there will be weight reduction of 25% for rigid pavements and 35% for flexible pavements.
Refer to the MDOT Truck Operators Map for route designations.
Extended permits will be valid for oversize only in the weight restricted area.

Spring Weight Restrictions: http://mdotwas1.mdot.state.mi.us/public/alerts/bulletins.cfm?bulletin=weight

Courtesy Steven Horwood, Michigan State Police
Also take a look at our Trucking Supplies page and download or request our Trucking Solutions Catalog

US hours of service waiver

Effective March 18, 2010 the FMCSA has granted a limited 90-day waiver from the Federal hours-of-service (HOS) regulations for the transportation of anhydrous ammonia from any distribution point to a local farm retailer or to the ultimate consumer, and from a local farm retailer to the ultimate consumer, as long as the transportation takes place within a 100 air-mile radius of the retail or wholesale distribution point.

This 90-day waiver allows carriers with a satisfactory safety rating to use the HOS exemption when their drivers are delivering anhydrous ammonia from any distribution point to a local farm retailer or to the ultimate customer, and from a local farm retailer to the ultimate customer as long as the transportation takes place within a 100 air-mile radius of the wholesale distribution point or the local farm retailer. This 90-day waiver preempts inconsistent State and local requirements applicable to interstate commerce and is effective as of March 18, 2010.

Courtesy Lt. C. Black, Michigan State Police