Why do I need a permit?

A No Fee Permit (NFP)  may be issued for IoH, Ag CMVs or 2-vehicle combinations transporting an IoH or an Ag CMV exceed maximum weight and length limits. A No Fee Permit makes vehicles (or vehicle combination) exceeding the limits legal to operate on Wisconsin highways. When a vehicle exceeds size and weight limits, for the highways on which the vehicle is operated, it is not a legal vehicle. A No Fee Permit for an IoH or an Ag CMV makes the vehicle legal. The No Fee Permit must be carried with the vehicle, in either an electronic or print format. If the vehicle is stopped by law enforcement or involved in a crash, the No Fee Permit is used to determine the legal operating weights and length.

2013 Wisconsin Act 377 gave local maintaining authorities options for maximum weight and length limits on their roads. See local options. Maximum weight and length limits for state and US highways were set at based on the IoH/Ag CMV Maximum Weight Table at 92,000 pounds GVW and 23,000 pounds per axle weight. The IoH/Ag CMV weight limits do not apply on  Interstate highways.

A color photo of a Case tractor with a blade used for packing silage.

Image 1.                                                                    This packing tractor is an example of an IoH Category A vehicle. The maximum GVW for this vehicle when the IoH/Ag CMV weight table applies is 46,000 pounds. Maximum axle weight is 23,000 pounds.

An Example Situation

Using an example of a packing tractor that you want to move between farms with the blade on it.  The packing tractor is an IoH Category A. On most roads this tractor needs to apply the IoH/Ag CMV Maximum Weight Table to determine the maximum gross vehicle weight. Axle weight limit is set at 23,000 per axle. There are some municipalities that have opted out of these weight limits for IoH and Ag CMVs so you need to know the local option for the roads that you want to operate on.

Applying IoH/Ag CMV Weight Table

The packing tractor (Image 1) has two axles with a distance from the center of the front axle to the center of the rear axle of 12 feet 7 inches. The front axle with the blade attached weighs 33,000 pounds and the rear axle weighs 11,000 pounds. Combining the weight of the two axles the total weight or gross vehicle weight is 44,000 pounds. Using the IoH/Ag CMV Maximum Weight Table (Image 2), the maximum weight for this packing tractor is 46,000 pounds. The next step is to apply the maximum axle weight limit of 23,000 pounds. The front axle of the packing tractor is 33,000 pounds so it is over the maximum axle weight limit. A No Fee Permit would be needed for this packing tractor to operate legally on any road in Wisconsin were the maintaining authority hasn’t opted out of weight limits.


  • No Fee Permit Application for all
    An image of the IoH/Ag CMV maximum weight table

    Image 2.                                                                    The IoH/Ag CMV Maximum Weight Table used to determine a vehicle’s maximum GVW when axle weight limits apply.

    Self-Propelled, Towed, or Attached Implements of Husbandry (IoH) and Agricultural Commercial Motor Vehicles (Ag CMV) MV2578 is available from the WisDOT website at AgVehicles.DOT.wi.gov .

  • MV2578 is a standard permit application used by all maintaining road authorities – state, county, town, cities and villages.
  • Each maintaining authority (MA) will issue their own permits and only for roads in their jurisdiction.
  • A NFP may be issued to exceed posted road limits but not to exceed bridge postings.
  • WisDOT is the MA for all bridges that cross over state, US, or interstate highways.
  • Crossing an intersection does not require an additional NFP for the road you are crossing if you are operating under a No Fee Permit or opt-out resolution. [s.348.27(19)(c) 8 Wis. Stats.]
  • Some highways have shared jurisdiction (e.g., county or town line highways), be sure to know the correct MA.


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