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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 visit them online.

Approval to operate on roads under Winnebago County jurisdiction is given either by a County Permit or as part of the Iowa DOT All Systems Permits.

County Permits

Oversize/Overweight Permit Application    Permit Map

For faster processing permit applications can be emailed to the Road Department or they can also be mailed in. 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


The Iowa DOT offers All Systems Oversize/Overweight Permits for pre-approved routes through the state, including in Winnebago County on certain routes. Visit the Iowa DOT All Systems page for additional guidance.

All Systems Permit Fact Sheet    All Systems Overweight Permit Map

more helpful Links

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

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