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Permits by state
What the Wyoming Highway Patrol and WYDOT require before an oversize or overweight load moves in Wyoming: legal limits, permits and fees, escorts, and holiday rules. Sourced from WHP and WYDOT rules.
Last verified: against official state sources.
The numbers
| Dimension | Legal limit |
|---|---|
| Width | 8 ft 6 in |
| Height | 14 ft |
| Length | 60 ft single unit or semi-trailer; 81 ft truck-tractor combinations |
| Axles | 20,000 lb single, 36,000 lb tandem, 42,000 lb triple |
| Gross weight | Interstate 117,000 lb by formula (Table I); primary/secondary 80,000 lb (Table II) or 117,000 lb by formula |
All loads over legal size or weight must have a permit or permission before traveling on Wyoming highways.
Source: WHP: Commercial Carrier. Checked Oct 15, 2026.
Permits
Loads up to 18 ft wide, 17 ft high, 120 ft long (combination) and 160,000 lb GVW can be cleared through a Wyoming port of entry or highway shop. Anything larger goes to the Overweight Loads Office in Cheyenne, and loads over 18 ft wide or high need at least 24 hours' prior notification.
| Permit | Published fee |
|---|---|
| Non-divisible oversize | $25.00, plus $0.03 per foot per mile beyond 15 ft wide, 15 ft high, or 75 ft long |
| Non-divisible overweight | $40.00 minimum, $0.06 per ton per mile on the greatest excess weight |
Permits are issued for a reasonable period, up to 4 days.
Sources: WHP: Commercial Carrier; WYDOT Rules Ch. 5 Sec. 4; Ch. 5 Sec. 7. Checked Oct 15, 2026.
Pilot cars
| Situation | Requirement |
|---|---|
| Two-lane roads, 14 ft wide or more, or crossing the centerline | 2 escorts (front and rear) |
| Interstate/divided highways, 15 ft wide or more | 1 rear escort |
| Two-lane roads, 110 ft long or more | 2 escorts (front and rear) |
| Interstate/divided, 150 ft long or more | 1 rear escort |
| Rear overhang 25 ft or more | Escort on all highways |
| Height | At the discretion of the approving authority |
Escorts stay about 1,000 ft from the load. WHP may require more.
Sources: WYDOT Rules Ch. 5 Sec. 8; WHP: Commercial Carrier. Checked Oct 15, 2026.
When you can roll
Oversize moves are generally daylight only. Exceptions (legal height, properly permitted, signed and lit): single units 60-75 ft, combinations under 100 ft, and loads up to 10 ft wide on interstates.
Holidays: moves requiring escorts may not run on New Year's Day, Memorial Day, July 4, Labor Day, Thanksgiving (Thanksgiving Day only) or Christmas, from ½ hour after sunset the evening before until ½ hour before sunrise the day after. Three-day weekends extend that over the whole weekend; Saturday and Sunday holidays have their own windows.
Check route-specific limits (for example the Wind River Canyon tunnels on US 20/WY 789) on WYDOT's Size/Weight Restrictions Summary.
Sources: WHP: Commercial Carrier; WYDOT Rules Ch. 5 Sec. 7. Checked Oct 15, 2026.
Permit office
Phone (307) 777-4376. Apply online at wydotpermits.wyo.gov. whp.wyo.gov: Commercial Carrier
Rather not deal with it? Run your load through our permit checker, then call (310) 989-6530.
Quick answers
The legal width in Wyoming is 8 ft 6 in without a permit.
The legal height in Wyoming is 14 ft without a permit.
Two escorts are required on two-lane roads for loads 14 ft wide or more, and one rear escort on interstates for loads 15 ft wide or more.
A non-divisible oversize permit is $25.00, plus $0.03 per foot per mile beyond 15 ft wide, 15 ft high or 75 ft long.
Call (307) 777-4376 or apply at wydotpermits.wyo.gov.
Answers summarize the sourced sections above. Last verified Oct 15, 2026.
Keep reading
For lanes, industries and how we plan Wyoming moves, see Heavy Haul Trucking in Wyoming. For cross-state answers on pilot cars, legal width and height, superloads and holiday rules, see the Heavy Haul FAQ.
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