Oversize Ag Equipment: Permits and Escort Rules in ND
October 6, 2026 - 8:41:36 am
Quick Summary: Oversize ag equipment permits in North Dakota are triggered once a load exceeds 8'6" wide, 14' tall, or 80,000 lbs, with pilot car escorts required starting around 14'6" wide and both front and rear escorts required past 16'. North Dakota also runs two permits built specifically for farm equipment — the Custom Harvest Permit and the Seasonal Permit — plus a standing exemption that lets a farmer move their own hay without any permit at all in most cases.
When Does Moving Ag Equipment in North Dakota Require a Permit?
North Dakota requires an oversize or overweight permit once a vehicle or load exceeds any one of these thresholds: 8'6" in width, 14' in height, or 80,000 lbs on interstate highways (105,500 lbs on non-interstate routes). A fully loaded combine, a wide planter, or a grain cart on a trailer can easily clear the width limit even though nothing about the move feels like a "heavy haul."
Farm equipment gets real relief here that a commercial carrier doesn't. A North Dakota farmer or rancher moving their own hay — bales or haystacks, on any type of equipment — isn't required to carry a seasonal or single-trip permit at all, regardless of width, unless the load exceeds 14' in height on an interstate highway. That exemption is specific to a farmer moving their own product, though — custom harvesters and commercial haulers still need the right permit for the equipment they're running.
Escort and Pilot Car Rules by Load Width
Once a load gets wide enough, lights alone stop being sufficient and a pilot car becomes part of the move.
| Load Width | Escort Requirement |
|---|---|
| Up to roughly 14'6" | Rotating or flashing amber lights; no pilot car required |
| 14'6" to 16' | One pilot car (or an amber-light alternative on some routes) |
| Over 16' on two-lane highways | Pilot cars required front and rear |
| Over 16' on four-lane divided highways | One pilot car, rear only |
A combine with the header removed and loaded on a trailer, or an auger cart pulled wide-load style, often lands right in that 14'6"–16' range — exactly where a single pilot car becomes mandatory rather than optional.
Two Permits Built Specifically for Farm Equipment
Two permits exist specifically to cover agricultural moves without requiring a single-trip oversize permit for every trip.
Custom Harvest Permit
The Custom Harvest Permit covers both nonresident custom harvesters and resident farmers running farm-registered vehicles. A resident permit costs $25 per vehicle and can be issued anytime, valid through December 31; a nonresident permit runs $50 per vehicle, valid June 1 through December 31, plus a separate $15 fuel permit required at entry. With this permit in hand, a custom harvester can move combines side by side up to 12' wide without pulling a separate oversize permit, and two combines can ride on one trailer as long as the combined length doesn't exceed 60'.
Seasonal Permit
The Seasonal Permit covers haystack and hay bale movers, overwidth self-propelled fertilizer spreaders and chemical applicators, and overwidth hay grinders, grain cleaners, and forage harvesters. It runs $50 and stays valid for a full 12 months from issuance — one permit covers an entire season's worth of moves rather than a single trip. Width allowances vary by equipment: stackmovers are exempt from width restrictions entirely, hay bale trailers can run up to 12'10" including the loading arm, and other hay-hauling vehicles top out at 12'. Height allowances run up to 17'6" for haystack equipment and 15' for other hay-hauling vehicles, with self-propelled equipment capped at 22,000 lbs on a single axle (20,000 lbs per axle on interstate routes).
Travel Time and Lighting Rules You Can't Skip
Every oversize move in North Dakota carries equipment and timing requirements on top of the permit itself. Daytime moves need minimum 18" by 18" red or bright orange flags on the front and rear of the load, plus a 12" by 60" yellow oversize load sign with black lettering at least 8" tall once a load exceeds 75' in length or 8'6" in width. A load extending 4' or more past the back of the vehicle bed needs its own 12" by 12" red flag marking the overhang.
Night travel is restricted unless the load is 12' wide or less, or specifically approved — and no permit authorizes travel during inclement weather, on slippery roads, or when visibility drops to half a mile or less. Loads wider than 16' face the tightest window: travel only from 30 minutes before sunrise to 30 minutes after sunset, no movement after noon on Saturday, none at all on Sunday, and a full blackout from noon the day before through sunrise the day after each of six major holidays.
Frequently Asked Questions
Do I need a permit to move my own combine between fields in North Dakota?
Usually not for a standard width combine driven under its own power on a public road for a short distance, but once you're hauling it on a trailer at a width over 8'6", you're into oversize permit and escort territory — or the Custom Harvest Permit if you qualify as a resident farmer.
What's the difference between the Custom Harvest Permit and the Seasonal Permit?
The Custom Harvest Permit is built around moving combines — including two side by side up to 12' wide — for both resident farmers and nonresident custom harvesters. The Seasonal Permit instead covers a broader set of farm equipment, including hay movers, fertilizer spreaders, and forage harvesters, each with its own width and height allowance.
At what width do I need a pilot car in North Dakota?
Lights alone generally cover a load up to about 14'6" wide. Past that, a single pilot car is typically required, and once a load exceeds 16' wide on a two-lane highway, both a front and rear pilot car are required.
Can I move hay on my own farm without any permit at all?
Yes — North Dakota farmers and ranchers moving their own hay, whether baled or stacked, are exempt from both the seasonal and single-trip permit requirement regardless of the equipment used, as long as the load stays at or under 14' tall on an interstate highway.
Haul It Right With Wallwork Truck Center
Whether it's a combine, a grain cart, or an oversized implement that needs a dedicated trailer rather than a flatbed afterthought, Wallwork carries XL Specialized trailers built for exactly this kind of oversized agricultural and construction equipment hauling. Browse current inventory or contact our team to talk through the right truck and trailer combination for moving your equipment legally and safely across North Dakota.