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Oversize/Overweight Permits

The State of Iowa has legal limits for the length, width, height, and axle weights for vehicles traveling on Iowa roadways. See below for more information.

Winnebago County may issue permits for the movement of construction machinery or vehicles with indivisible loads which exceed the maximum dimensions and weights prescribed by law. Permits are required from all jurisdictions (city streets, county roads, and DOT Highways) along the route. For Iowa DOT Permits, call Motor Carrier Services at 515-237-3264 or online.

County Permits

Oversize/Overweight Permit Application    Permit Map

For faster processing permit applications can be emailed to the Road Department at [email protected]. Applications can also be mailed or faxed. View all contact information on the Road Department page.


Oversize/overweight (OS/OW) loads are enforced by the DOT’s Motor Vehicle Enforcement Officers in cooperation with local law enforcement. A permit is typically required if vehicle dimensions exceed:

  • Width: 8 feet 6 inches
  • Height: 13 feet 6 inches
  • Length: 41-foot single vehicle
  • Weight: 20,000 lb. single axle
  • 53-foot trailer
  • 57-foot lowboy trailer hauling construction equipment
  • 34,000 lb. tandem axle
  • 80,000 lb. gross weight


Semi-truck along Winnebago County road towing an oversized/overweight item.

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