Act 15 Updates to IoH/Ag CMV laws

Act 15 took effect on April 30, 2015, to clarify and modify certain provisions. The most significant changes include:

  • Modified the definition of an Ag CMV and allows Ag CMVs that directly harvest farm products, distribute feed to livestock, or apply lime, spray, seeds, or fertilizer (but not manure) to have the same axle weight exemption of Category B IoH
  • Requiring farm implement dealers to disclose the axle weight, in addition to the gross vehicle weight, at the time of sale.
  • Authorizing IoH with rubber tracks to operate on the road as long as it does not damage the highway
  • Allowing for the transport of IoH and Ag CMVs by trailer or semi-trailer at the increased agricultural vehicle weight limits from farm to f. A trailer or semi-trailer that is hauling an IoH or Ag CMV and exceeds the agricultural weight limits may apply for a no-fee permit.
  • Allowing a vehicle authorized by permit or local resolution/ordinance to cross an intersecting highway under a different jurisdiction
  • Changing the date by which a local unit of government must adopt an ordinance for it to be effective in the following year to November 30. A copy of the ordinance must be sent to the department by January 20 of that year.

The permit application forms will soon be revised to reflect the changes included in Act 15. NOTE: All no-fee permit applications, submitted prior to April 30, 2015, that are currently under review by the department will be reviewed in accordance with the changes included in Act 15.

A new interactive map is now available to help operators of agricultural vehicles determine if they need a no-fee permit or more than one permit for equipment that exceeds the increased weight limits.

For more info. about the new IoH and Ag CMV regulations, contact:

  • Phone: (608) 266-7320
  • Wisconsin Department of Transportation
    PO Box 7980
    Madison, WI 53707-7980




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