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Agricultural equipment and vehicles
Local Government Resolutions and Ordinances page/information now available.
2013 Wisconsin Act 377, enacted in April 2014, sets weight and length limits for IoH and Ag CMV, with specific exemptions, especially in regards to Category B IoH. It also allows local government officials to pass resolutions or ordinances regarding the maximum gross vehicle and axle weight limits for Implements of Husbandry (IoH) and Agricultural Commercial Motor Vehicles (Ag CMVs) operating upon roads under their jurisdiction.
- Local authorities options
- Local Government Resolutions and Ordinances adopted prior to Jan. 15, 2015
Series of nine IoH training videos available on various aspects of the law.
Wisconsin Act 377 makes several changes to the way agricultural vehicles may operate on the public roadway. The most significant changes include:
- Updating the definition of agricultural vehicles or Implements of Husbandry (IoH).
- Creating a new class of vehicles – Agricultural Commercial Motor Vehicle (Ag CMV).
- Increasing the weight limit for IoH and Ag CMVs operating on the roadway.
- Creating a free agricultural vehicle permit to operate greater than the new legal weight and length limits.
In general, under the new law, vehicles defined as IoH and Ag
CMVs will be allowed to operate at 15 percent higher weight limits than
previously allowed, or 92,000 pounds Gross Vehicle Weight (GVW) and
23,000 pounds per axle, dependent on number of axles and axle
spacing and subject to seasonal or special postings. An
Maximum Weight Limits table was created to reflect these new limits.
The definition and weight provisions are effective April 24, 2014. The No-Fee IoH/Ag CMV permit application is now available; however the application is not required to be used until Jan. 1, 2015. This application will be used by all maintaining road authorities that require a permit to operate over the new weight and length limits.
In addition to the expanded weight limit, the bill:
- Exempts all IoH and Ag CMVs from registration.
- Exempts empty potato harvesters, and in certain situations Category B IoH vehicles, from axle weight limits.
- Sets new length limits for single, two- and three-vehicle combinations.
- Requires additional lighting and marking, effective Nov. 1, 2015, for IoH that exceed 15 feet in width. Vehicles exceeding 22 feet in width will need to be accompanied by an escort vehicle.
- Sets new width limits of ten feet for Ag CMVs, allowing up to 12 feet for certain vehicle’s fenders, fender flares or tires.
- Creates a Self-Certification process for Ag CMVs.
- Requires sellers of farm equipment to disclose the GVW of farm equipment, effective Jan. 1, 2015.
- Prohibits passing of an IoH or Ag CMV in a no-passing zone.
- Allows State Patrol to only issue warnings, not citations,
for farm tractors and
Category B IoH vehicles
exceeding the new weight limits until Jan. 15, 2015.
- This delayed enforcement period does not apply to violations that occur on the Interstate Highway System and does not apply to any official with the authority to enforce size or weight regulations other than State Patrol.
WisDOT Division of Transportation System Development (DTSD), firstname.lastname@example.org
Last modified: October 28, 2014
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