Legal size limits without a permit
| Measurement | Wyoming legal limit |
|---|---|
| Height | 14'0" (no permit) |
| Width | 102 inches / 8'6" (no permit) |
| Front Overhang | Not separately published beyond overall length limits |
| Rear Overhang | Not separately published beyond overall length limits |
Axle and gross weights
How much each axle group and the whole vehicle can carry in Wyoming, without a permit and with an overweight permit.
| Axle group | Legal limit | With a permit |
|---|---|---|
| Steer axle | Confirmed at filing | Confirmed at filing |
| Single axle | 20,000 lbs | Up to 10% in excess of allowable axle weights under standard special permits |
| Tandem axle | 36,000 lbs | Up to 10% in excess of allowable axle weights; larger non-divisible loads reviewed individually |
| Tridem axle | 42,000 lbs | Confirmed at filing |
| Quad axle | Confirmed at filing | Confirmed at filing |
| Gross weight | Determined by federal/state bridge formula | Standard special permits allow up to 5,000 lbs in excess of legal gross weight |
Superload: Any load exceeding 160,000 lbs, or 17' in height, is classified as a superload
Permit types we file in Wyoming
Single Trip PermitOne-time permit for a specific oversize/overweight move and route.
Annual/Overweight-Size PermitPermit allowing repeated moves within standard axle/gross-weight tolerances.
Superload PermitReviewed by the Wyoming Highway Patrol's Overweight/Superload Loads Office for loads exceeding 160,000 lbs or 17' in height.
Maximum dimensions with a permit
| Dimension | Maximum with a permit |
|---|---|
| Length | Evaluated per route/bridge analysis; no single flat statewide ceiling published |
| Width | Up to 20' before requiring the highest escort tier |
| Height | Up to 17' before superload classification; loads 18'+ require utility/city/county route authorization |
| Rear Overhang | Not separately published; governed by overall length and escort requirements |
Wyoming classifies a load as a superload once it exceeds 160,000 lbs gross weight or 17' in height.
Escorts and travel restrictions
Escort & pilot car rules
- Loads 20' wide or greater: 2 front + 1 rear escort on primary/secondary highways; 2 rear escorts on Interstate highways.
- Loads 18' or greater in height require advance route authorization from utilities, cities, and counties.
When you can travel
- Superloads and oversize/overweight loads are subject to route-specific approval by WYDOT and the WHP Overweight/Superload Loads Office before travel.
Signs, flags and lights
Most states require
- An “OVERSIZE LOAD” banner on the front of the truck and the rear of the load.
- Red or fluorescent orange warning flags at each corner and at the widest points of the load.
- Amber warning lights or clearance lights when moving at night, where night travel is allowed.
Wyoming specifics
- Banner size, flag size and light rules for Wyoming are listed on your permit.
- We include them in your permit notes so your driver has them before the trip.
Rules change. Limits and requirements are set by WYDOT and can change. We confirm the current rules for your exact load before filing.