Wyoming oversize load rules
Legal limits, pilot car requirements, travel restrictions, superload thresholds and permit fees for oversize and overweight loads in Wyoming.
Legal limits without a permit
| Width | 8′6″ (W.S. 31-18-802) |
|---|---|
| Height | 14′ |
| Length | 60′ single vehicle · 60′ semitrailer · 81′ semitrailer and trailer · 85′ other combinations (max three units) |
| Weight | 80,000 lb gross (Table I Interstate; Table II at 48′+ axle spread) |
At a glance
| Escorts | 5 escort rules, starting at 14′ wide |
|---|---|
| Superload | 4 review triggers (height, length, weight, width) |
| Travel | 4 restrictions (curfews, night, holidays) |
| Fees | 3 published fee lines |
Escort (pilot car) requirements
- 5 width, height and length thresholds with the escort count for each
- Overhang and route-type conditions
Travel restrictions
- 4 restrictions: curfews, night travel, weekends and holidays
- Which ones apply to a given load size
Superloads
- Exact thresholds and what the state requires past them
- Lead times, route surveys and police escort conditions
Permit fees
- 3 published fee lines with links to the fee schedule
- Validity periods and add-on charges
Common questions
When does Wyoming require escorts?
Two-lane highways: 14′ wide or more, or 110′ or longer (front and rear). Interstate and divided highways: 15′ wide or more, or 150′ or longer (rear). Over 17′ high needs a front escort with a height-measuring device; rear overhang of 25′ or more needs a rear escort.
What is a Class A superload in Wyoming?
Anything over 18′ wide, 17′ high, 120′ overall or 160,000 lb gross, or above Class B axle limits. The OWL alone approves them, with 24 hours' notice over 18′.
Can oversize loads move at night in Wyoming?
Generally no. Exceptions: up to 10′ wide on Interstates, certain long single units, or with Highway Patrol permission.
Sources
- WYDOT Rules Chapter 5 §8, Safety Measures and Moves (escort thresholds)
- WYDOT Rules Chapter 5 §7, Permitted Hours and Dates of Movement; Weather
- WYDOT Rules Chapter 5 §4, Permit Types and Class A/B/C/D limits
- WYDOT Rules Chapter 5 §9, Escort Procedures
- Wyoming Statutes 31-18-802 to 804, size and weight limits and permit fees
- WYDOT overview of standard permitting and Class A superloads (2026)
Planning reference. Permits carry their own conditions, and city and county roads have separate rules. Confirm with the Wyoming Highway Patrol Overweight Loads Office (OWL) and Ports of Entry before moving a load. Found an error? Report it.
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