Wyoming Oversize & Overweight Permit Rules
What a load can be in Wyoming without a permit, where the permit and escort tiers start on 2-lane roads and multi-lane roads, when it can move, and who to call. Every figure is the JaloPermit Atlas entry for Wyoming, shown as the app shows it.
Rules as of Jul 31, 2026 · Links checked Jul 13, 2026
Read this before you trust a number. Rules change. The issued permit, posted signs and the state permit office always win over this page. JaloPermit is a reading aid, not a permit-filing service. Guests get 3 free decodes a day with no account and no card, logged-in users get 10 a day, and extra decodes are $3.50 each with no subscription.
What moves in Wyoming without a permit
Legal limits are the dimensions and gross weight a vehicle may run at without an oversize or overweight permit. Wyoming publishes its length limit as overall combination, so compare it against that measurement on your permit, not the overall rig.
Where the permit and escort tiers start
| Dimension | Legal without permit | Permit tier starts | First escort on 2-lane roads | First escort on multi-lane roads |
|---|---|---|---|---|
| Width | 8'6" | 8'7" | 14' · Front + Rear | 15' · Rear escort |
| Height | 14'0" | 14'1" | 17'1" · Front + High pole | 17'1" · Front + High pole |
| Length | 85'0"overall combination | 85'1" | 110' · Front + Rear | 150' · Rear escort |
| Weight | 117,000 lbs | Check the state permit office. | — | — |
"Permit tier starts" is the lowest size in the Atlas ladder that needs a permit. "First escort" is the lowest size that adds a private or police escort on that road class; the full ladder with each tier's rule and source is below.
Wyoming escort ladder, tier by tier
Open a tier to read the rule behind it, quoted with its source. Amber tiers add a police escort or a superload review; grey tiers are permit-only with conditions.
On 2-lane roads
Escorts begin at 14' wide
Width
Permit required8'7" – 13'11"
Permit required; no escort below 14 ft unless the load extends left of centerline
Front + Rear14' – 18'
2 escorts (1 front, 1 rear) at 14 ft or greater, or whenever any part extends left of the centerline
Front + Rear18'1"+
Over 18 ft is a Class A super load: OWL approval, 24-hour notice, no travel during school bus or commuter hours. Above 30 ft, this row's escorts are the minimum; the permit sets any more.
Height
Permit required14'1" – 17'
Permit required; escort at 17 ft or less is at the permit-issuing authority's discretion
Front + High pole17'1"+
Over 17 ft requires 1 front escort with a height-measuring device; over 18 ft needs 24-hour prior notice. Above 20 ft, this row's escorts are the minimum; the permit sets any more.
Length
Permit required85'1" – 109'11"
Permit required; no escort for length below 110 ft unless the load extends left of centerline
Front + Rear110'+
2 escorts (1 front, 1 rear) at 110 ft or greater overall, or whenever the load extends left of the centerline. Above 300 ft, this row's escorts are the minimum; the permit sets any more.
On multi-lane roads
Escorts begin at 15' wide
Width
Permit required8'7" – 14'11"
Permit required; no escort below 15 ft on interstate or divided highways
Rear escort15' – 18'
1 rear escort at 15 ft or greater on interstate, divided, or four-lane with center left-turn lane; WHP may add escorts
Rear escort18'1"+
Over 18 ft is a Class A super load: OWL approval and 24-hour prior notice; over 26 ft barred where roadway is 32 ft or less. Above 30 ft, this row's escorts are the minimum; the permit sets any more.
Height
Permit required14'1" – 17'
Permit required; escort at 17 ft or less is at the permit-issuing authority's discretion
Front + High pole17'1"+
Over 17 ft requires 1 front escort with a height-measuring device; over 18 ft needs 24-hour prior notice. Above 20 ft, this row's escorts are the minimum; the permit sets any more.
Length
Permit required85'1" – 149'11"
Permit required; no escort for length below 150 ft on interstate or divided highways
Rear escort150'+
1 rear escort at 150 ft or greater overall; OWL may require escorts below 150 ft; over 120 ft overall is a Class A super load. Above 300 ft, this row's escorts are the minimum; the permit sets any more.
When a permitted load can move
- Standard hours
Oversize loads: daylight hours only. Overweight-only loads meeting legal size limits may move at any hour with a permit. The permit-issuing authority may further restrict a move to daylight hours of minimum traffic volume as a permit condition.
- Night travel
Daylight only unless legal height, permitted, signed and lighted: a single unit alone over 60' but not over 75'; a single unit over 60' in a combination under 110' overall; a load up to 10' wide on Interstate only (5-mile allowance off-Interstate for fuel, food, delivery).
- Weekend travel
No weekend-specific rule is published apart from holidays. Moves requiring escorts are barred across a holiday weekend, one-half hour after sunset the day before to one-half hour before sunrise the day after; holiday on Saturday closes Thursday sunset to Monday sunrise.
- Holiday restrictions
Only oversize moves requiring escorts are restricted: New Year's Day, Memorial Day, Independence Day, Labor Day, Christmas Day, from one-half hour after sunset the evening before to one-half hour before sunrise the day after. Thanksgiving is restricted that day only.
- Urban restrictions
Loads over 18' wide may not travel on primary or secondary highways during local school bus hours or heavy commuter traffic as determined by the Overweight Loads Office. Loads over 26' wide are barred where the roadway is 32' wide or less.
Signage Wyoming expects
- Oversize load sign
OVERSIZE LOAD signs must be fully visible front and rear on every oversize move: yellow background, at least 60 inches wide by 10 inches high, black letters at least 8 inches high and 1 inch wide on a single line. Cover or remove when not oversize.
- Flags
Red or fluorescent orange flags at least 12 inches square at each front and rear corner that exceeds legal width, at any wider extremity, and on rear overhang of 4 feet or more; one flag if the overhang is 2 feet wide or less, two flags if wider.
- Beacons
Over-width loads moving after daylight need amber clearance lights on each front corner, red on each rear corner, plus a revolving amber light, amber strobe, or paired two-way flashing amber lights at least 4 in. across, visible 1,000 ft. Escorts carry the same.
Wyoming permit office
The permit office is the authority on every number on this page. Call it, or open the official site, before you rely on a threshold for a load that is close to a line.
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What are the legal limits in Wyoming without an oversize or overweight permit?
In Wyoming, the legal limits without an oversize or overweight permit are 8'6" wide, 14'0" high, 85'0" long (overall combination) and 117,000 lbs gross. Legal overhang is 3'0" front and 4'0" rear. Anything over those figures needs a permit from the Wyoming permit office before it moves.
When does an oversize load need an escort or pilot car in Wyoming?
On 2-lane roads in Wyoming, escorts begin at 14' wide. On multi-lane roads, escorts begin at 15' wide. The first escort tier is "Front + Rear" at 14' – 18' wide. Every tier on this page quotes its rule and source.
Can oversize loads travel at night, on weekends or on holidays in Wyoming?
Night travel: Daylight only unless legal height, permitted, signed and lighted: a single unit alone over 60' but not over 75'; a single unit over 60' in a combination under 110' overall; a load up to 10' wide on Interstate only (5-mile allowance off-Interstate for fuel, food, delivery). Weekend travel: No weekend-specific rule is published apart from holidays. Moves requiring escorts are barred across a holiday weekend, one-half hour after sunset the day before to one-half hour before sunrise the day after; holiday on Saturday closes Thursday sunset to Monday sunrise. Holidays: Only oversize moves requiring escorts are restricted: New Year's Day, Memorial Day, Independence Day, Labor Day, Christmas Day, from one-half hour after sunset the evening before to one-half hour before sunrise the day after. Thanksgiving is restricted that day only.