Wyoming oversize permit requirements
Wyoming issues the shortest permit in the country. One day, or one trip — not three, not five, and certainly not the fifteen Indiana allows. A Wyoming permit is bought for a specific movement and consumed by it.
It also carries a requirement with real teeth. The permit office must be given at least an hour's notice before the load reaches a port of entry. Failing to give it can cost up to five hundred dollars and a twenty-four hour shutdown — which on a one-day permit means buying another one as well. Very few states attach a penalty of that size to a procedural step, and it is the single most expensive thing to forget in Wyoming.
The rules themselves are straightforward. Daylight movement including weekends, with night travel allowed on the Interstate for loads within ten feet of width. Holidays are generally open to loads that need no escorts, though port of entry closures may apply, so pre-ordering is sensible. Legal length is sixty feet for the semitrailer and load including overhang — short by national standards, so a long trailer becomes oversize here sooner than elsewhere. Routine permits reach a hundred and ten feet of length, eighteen feet of width and seventeen feet of height, with tandems to fifty-five thousand pounds and gross registration available to a hundred and seventeen thousand.
Legal dimensions
At or under these figures, no oversize permit is required in Wyoming.
- Width
- 8′6″
- Height
- 14′0″
- Gross weight
- 80,000 lb
- Overhang
- Counted within the 60′ limit on the semitrailer and load
- Single axle
- 20,000 lb
- Tandem
- 36,000 lb
- Tridem
- 36,000 lb at 8′ spacing, 42,000 lb at 8′1″–8′5″, 42,500 lb above 8′6″, 43,500 lb above 10′
Routine permit limits
Above legal dimensions and up to these figures, Wyoming issues a permit as routine business. Beyond them the load becomes a superload, reviewed case by case.
- Length
- 110′
- Width
- 18′
- Height
- 17′
- Single axle
- 25,000 lb
- Tandem
- 55,000 lb
- Tridem
- 65,000 lb
- Gross
- Registration available to 117,000 lb
Escort requirements
A load reaching any of these figures needs an escort in Wyoming — the figure is the first size that requires one, so a load measuring exactly this much already needs it.
- Width
- 15′0″
- Height
- 15′0″
- Length
- 150′0″
When the load may move
Permit validity. Permits are usually valid for one day or one trip — the shortest in the country. The permit office must be given at least an hour's notice before the load reaches a port of entry.
Operating time. Daylight — half an hour before sunrise to half an hour after sunset — including weekends. Night travel is allowed on the Interstate for loads within 10′ of width with proper lighting.
Restricted travel. Holiday travel is generally allowed for loads that need no escorts, but port of entry closures may apply and pre-ordering is advised.
Worth knowing
- The permit lasts one day or one trip — the shortest in the country.
- At least an hour's notice must reach the permit office before the load arrives at a port of entry; failing to give it can cost up to $500 and a 24-hour shutdown.
- Legal length is 60′ for the semitrailer and load including overhang, which is short by national standards.
- Gross weight runs from 80,000 lb to 117,000 lb under the Federal Bridge Formula.
- Spring thaw restrictions may be imposed as needed rather than on a fixed calendar.
Wyoming permits, answered
How long is a Wyoming oversize permit valid?
One day, or one trip — the shortest in the country. It is bought for a specific movement and consumed by it.
What is the Wyoming port of entry notice rule?
The permit office must be told at least an hour before the load reaches a port of entry. Missing it can cost up to $500 and a 24-hour shutdown — and on a one-day permit, the shutdown means buying another permit too.
Can an oversize load travel at night in Wyoming?
On the Interstate, within 10′ of width, with proper lighting. Otherwise it is daylight, weekends included.
Why is my trailer oversize in Wyoming?
Legal length is 60′ for the semitrailer and load including overhang, which is shorter than most states. A combination legal elsewhere can need a permit here on length alone.
Can I travel on a holiday in Wyoming?
Generally yes if the load needs no escorts, but ports of entry may be closed — pre-order the permit rather than relying on picking one up.
Crossing more than Wyoming?
A permit is per state. If the route leaves Wyoming, these are the states it most likely enters.
Get a permit quote for Wyoming
Enter the load once and the estimator prices every state on the route, flags where an escort is required, and turns the quote into an order.
Price a permit for Wyoming →Compiled from published state DOT sources. Regulations change — confirm the current rules before dispatch. Last reviewed 2026-07-30.