In Wyoming, any load that exceeds the legal size or weight limits requires an oversize/overweight permit before it moves. Below are the legal limits and the requirements that apply at each threshold.
1When you need a permit
A load is oversize or overweight once it passes any of these:
| Dimension | Wyoming legal limit | Permit if over |
|---|---|---|
| Width | 8 ft 6 in | Wider |
| Height | 14 ft | Taller |
| Length (combination) | 75 ft | Longer |
| Gross weight | 80,000 lbs | Heavier |
| Single axle | 20,000 lbs | Heavier |
| Tandem axle | 36,000 lbs | Heavier |
Wyoming sets no general front-overhang allowance — freight ahead of the trailer counts toward its length limits.
2Escort & pilot car requirements
| Once the load is over… | Wyoming requires |
|---|---|
| 14 ft wide | 1 escort (pilot car) |
| 14 ft wide | 2 escorts |
| 17 ft high | Escort with a height pole / pole car |
| 110 ft long | 1 escort · 110 ft → 2 escorts |
| 17 ft high or 18 ft wide | Route survey required |
3When you can travel
- Daylight only — 30 min before sunrise to 30 min after sunset.
- Weekends: Weekend travel is allowed.
- Oversize loads daylight only except: loads up to 10 ft wide on Interstate highways only (5-mile allowance off the Interstate for food, fuel, services or delivery); a single unit over 60 ft in a combination under 110 ft overall; a single unit alone over 60 ft up to 75 ft - each permitted, signed and lighted per Sec 8. Overweight loads within legal size are not limited. Other moves need WHP permission..
- Holiday blackouts: New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, Christmas Day.
4Superloads in Wyoming
A load is a superload once it exceeds any of these:
| Superload trigger | Threshold |
|---|---|
| Width | 18 ft |
| Height | 17 ft |
| Length | 120 ft |
| Gross weight | 160,000 lbs |
Superloads require individual review and roughly 3 days of lead time for approval.
5Permit timing
- Superload review: ~3 days.
- Validity: a single-trip permit is good for ~4 days.
Get the full cost of your load
FreightDeck estimates every cost on an oversize move — permits, escorts, police, route survey, engineering, and the truck rate — for your exact load and route, across all 48 states and Canada, up to superload size.
Price your Wyoming load free →The most complete heavy-haul cost estimator · 48 states + Canada · no card to start · See plans & pricing
?Wyoming permit FAQ
When do I need an oversize permit in Wyoming?
Once a load exceeds any legal limit: 8 ft 6 in wide, 14 ft high, 75 ft long (combination), or 80,000 lbs gross.
When do I need a pilot car in Wyoming?
Wyoming requires one escort over 14 ft wide (two over 14 ft), and a height pole over 17 ft high.
Can you drive an oversize load at night in Wyoming?
Daylight only, 30 min before sunrise to 30 min after sunset. Oversize loads daylight only except: loads up to 10 ft wide on Interstate highways only (5-mile allowance off the Interstate for food, fuel, services or delivery); a single unit over 60 ft in a combination under 110 ft overall; a single unit alone over 60 ft up to 75 ft - each permitted, signed and lighted per Sec 8. Overweight loads within legal size are not limited. Other moves need WHP permission. Weekend travel is allowed within limits.
What counts as a superload in Wyoming?
Over 18 ft wide, 17 ft high, 120 ft long, or 160,000 lbs gross. It requires individual review and about 3 days of lead time.
How much does a Wyoming oversize permit cost?
The state permit fee depends on the load's size and weight. The full cost of a move also includes escorts, police, route surveys, engineering, and the truck rate, which vary by route. FreightDeck estimates all of it for your exact load — price your Wyoming load with FreightDeck →.
How long does it take to get an oversize permit in Wyoming?
Wyoming does not publish a standard processing time for routine permits; superload review takes about 3 days. A permit is valid for 4 days, so line up every state on the route before applying.
Can oversize loads move on weekends and holidays in Wyoming?
Weekend travel is allowed. Movement stops on New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, and Christmas Day; check the permit conditions for exact times.
How much overhang is allowed in Wyoming?
Wyoming sets no general front-overhang allowance — freight ahead of the trailer counts toward its length limits.
Does Wyoming require a route survey?
Yes, once a load is over 17 ft high or 18 ft wide. The survey checks every bridge, sign, signal and wire on the route and is filed with the permit; it usually takes longer than the permit itself, so start it first. What a route survey involves →
Are any loads exempt from oversize permits in Wyoming?
Wyoming publishes exemptions or relaxed rules for farm equipment (for example daylight only; agricultural operations. up to 16 ft: no escort if kept right of center line; oversize sign and warning lights required. over 16 ft wide (or can't stay right of center): escorts. over 18 ft wide or 17 ft high: overweight loads office approval. non-wyoming farmers/ranchers need an oversize permit. overlength/overweight need a permit). Exemptions are narrow and usually limited to specific roads and daylight hours; anything else over the legal limits needs a permit.
Does a Wyoming permit cover Montana?
No. Every state issues its own permit, and a move crossing into Montana, South Dakota, or Nebraska needs a separate permit there with that state's escort and travel rules. FreightDeck prices every state on the route in one quote.