What Wyoming charges for a single-trip OS/OW permit, the limits that trigger one, and the escort thresholds — read from the state’s own publication. This rule has been in effect since 2025-04-30.
Oversize permit
$25 + per mile
A base fee plus a charge for every foot of excess for every mile travelled. The distance you run changes the price, so there is no single figure.
Overweight permit
From $40
Scales with distance and weight — there is no single figure.
+ $20 Permigo service fee per permit, state fees at cost.
Legal limits
Exceed any one of these in Wyoming and you need a permit for this state.
Limit
Interstate
Width
8'6"
Height
14'0"
Length
60'0"
Gross weight
80,000 lbs
Single axle
20,000 lbs
Tandem axle
36,000 lbs
Tridem axle
42,000 lbs
Trailer length
60'0"
What the permit costs
Wyoming prices a single-trip permit as base plus per foot, per mile. A base fee plus a charge for every foot of excess for every mile travelled. The distance you run changes the price, so there is no single figure.
Escort requirements
Thresholds by road class. Where two classes differ, the road you are actually on governs.
Interstate / 4-lane divided
Width
Requirement
15'0" and over
1 rear escort15' wide OR GREATER (inclusive, Ch.5 §5-8 eff 4/30/2025): one REAR escort on interstate, divided highways, and four-lane roads with a center turn lane. Mixed-route moves take 1 escort on interstate + 2 on two-lane legs (a ≤5-mile two-lane PoE detour is exempt).
Over 18'0"
superload permitOver 18' wide = Class A SUPER LOAD (exceeds the standard-permit ceiling): approved ONLY by the OWL (M–F 7:30–4:30), ≥24-hour prior notice; loads over 26' wide are barred where the roadway is ≤32' wide (short-distance exceptions). Convoy allowances: 2 loads ≤16'W/110'L/16'H two-lane, ≤18'W/130'L/16'H interstate.
Height
Requirement
Over 17'0"
1 front escort · height pole · superloadEXCEEDING 17' high (Ch.5 §5-8(j), eff 4/30/2025 — the old 'no pole-car rule' is dead): front escort WITH height-measuring device on ALL highways, mandatory; ≤17' escorts are discretionary. >17' also exceeds the standard-permit ceiling = Class A (>18' high adds the 24-hr OWL notice). Wind River Canyon tunnels (US 20 BUS/WY 789): 15'–18' overheight requires traffic closure + centerline running; I-80/US 30 Cheyenne RM 382–393: 15'0" cap.
Length
Requirement
Over 120'0"
superload permitOver 120' overall = Class A SUPER LOAD (the standard ceiling); OWL-only approval; route studies may take 72+ hours.
150'0" and over
1 rear escort150' or longer overall on interstate: one REAR escort (Ch.5 §5-8 eff 4/30/2025 — the old 'discretionary' leaf is outdated; below 150' the OWL retains discretion). The WHP webpage still prints the pre-2025 text — the adopted rule controls.
Rear overhang
Requirement
25'0" and over
1 rear escortRear overhang 25' OR MORE: one rear escort, all highways — measured from a 49 CFR 393.86-compliant rear bumper, else from the last tire. NO rear-overhang legal cap exists: ≥4' takes flags/lamps (§31-5-919; one flag if the tail is ≤2' wide, two otherwise) and the tail counts into every load-inclusive length measure. NO front-overhang escort exists (the old matrix's ≥10' claim is REFUTED — width/length/rear-overhang/height/overweight are the only escort dimensions).
Weight
Requirement
160,001 lbs and over
route survey · superloadOver 160,000 lb = Class A SUPER LOAD; unlisted axle configurations go to the Bridge Program for analysis; cost reimbursement + state personnel accompanying the move at carrier cost applies to 'Loads Exceeding 125 Tons (250,000 pounds)' per the rule (§5-6(c)) — the statute prints 80 tons (§804(g)); conflict flagged, the rule is what the WHP operates. Permit axle ceilings: single 25,000 (55,000 on construction/off-road tires ≥18") / single-in-tandem 29,000 / tandem 55,000 / tridem 65,000; grouped axles (<7'6" spacing) 4→74,000 / 5→85,000 / 6→90,000.
2-lane primary / secondary
Width
Requirement
14'0" and over
1 front escort + 1 rear escort14' wide or greater (inclusive) on two-lane primary/secondary: front + rear escorts — AND independently whenever any portion of the load crosses left of the centerline, at ANY width (Ch.5 §5-8). Over 18' wide: barred during school-bus/commuter hours on primary/secondary (§5-7(a)(vii)). Escort vehicle: single unit only (no motorcycles/combinations), amber/strobe ≥4" visible 1,000', OVERSIZE LOAD sign + flags, TWO-WAY RADIO required ('Cellular or satellite telephones do not meet this requirement'), triangles, 5-lb BC extinguisher; ~1,000-ft spacing; NO certification program.
Over 18'0"
superload permitOver 18' wide = Class A SUPER LOAD (exceeds the standard-permit ceiling): approved ONLY by the OWL (M–F 7:30–4:30), ≥24-hour prior notice; loads over 26' wide are barred where the roadway is ≤32' wide (short-distance exceptions). Convoy allowances: 2 loads ≤16'W/110'L/16'H two-lane, ≤18'W/130'L/16'H interstate.
Height
Requirement
Over 17'0"
1 front escort · height pole · superloadEXCEEDING 17' high (Ch.5 §5-8(j), eff 4/30/2025 — the old 'no pole-car rule' is dead): front escort WITH height-measuring device on ALL highways, mandatory; ≤17' escorts are discretionary. >17' also exceeds the standard-permit ceiling = Class A (>18' high adds the 24-hr OWL notice). Wind River Canyon tunnels (US 20 BUS/WY 789): 15'–18' overheight requires traffic closure + centerline running; I-80/US 30 Cheyenne RM 382–393: 15'0" cap.
Length
Requirement
110'0" and over
1 front escort + 1 rear escort110' or greater overall on two-lane primary/secondary: front + rear escorts (Ch.5 §5-8).
Over 120'0"
superload permitOver 120' overall = Class A SUPER LOAD (the standard ceiling); OWL-only approval; route studies may take 72+ hours.
Rear overhang
Requirement
25'0" and over
1 rear escortRear overhang 25' OR MORE: one rear escort, all highways — measured from a 49 CFR 393.86-compliant rear bumper, else from the last tire. NO rear-overhang legal cap exists: ≥4' takes flags/lamps (§31-5-919; one flag if the tail is ≤2' wide, two otherwise) and the tail counts into every load-inclusive length measure. NO front-overhang escort exists (the old matrix's ≥10' claim is REFUTED — width/length/rear-overhang/height/overweight are the only escort dimensions).
Weight
Requirement
160,001 lbs and over
route survey · superloadOver 160,000 lb = Class A SUPER LOAD; unlisted axle configurations go to the Bridge Program for analysis; cost reimbursement + state personnel accompanying the move at carrier cost applies to 'Loads Exceeding 125 Tons (250,000 pounds)' per the rule (§5-6(c)) — the statute prints 80 tons (§804(g)); conflict flagged, the rule is what the WHP operates. Permit axle ceilings: single 25,000 (55,000 on construction/off-road tires ≥18") / single-in-tandem 29,000 / tandem 55,000 / tridem 65,000; grouped axles (<7'6" spacing) 4→74,000 / 5→85,000 / 6→90,000.
Movement restrictions
Restriction
In Wyoming
Night travel
Daylight hours only
Weekends
No blanket restriction
Holidays
Restricted
Movement hours
Situation
Window
Baseline (all oversize)
Daylight only: ½ hr before sunrise → ½ hr after sunset (Ch.5 §5-2(n))
Night exceptions
Width ≤10' on the INTERSTATE only (≤5-mi services allowance); single unit >60'–≤75' alone; combination with a >60' unit when overall <110' (the WHP page's '<100'' is pre-2025 text); WHP permission; emergencies
Overweight-only
NOT daylight-limited (§5-7(b)); weather classes 1–4 don't apply to OW-only loads
Weekends
Open — but the OWL is closed (no Class A approvals Sat/Sun)
Holidays (escorted moves only)
New Year's · Memorial · July 4 · Labor · Thanksgiving Day · Christmas: ½ hr after sunset the evening before → ½ hr before sunrise the day after; 3-day weekends sunset-before → sunrise-after; Sat holiday Thu-sunset→Mon-sunrise; Sun holiday Fri-sunset→Tue-sunrise (§5-7(e)) + 'local celebrations when heavy local traffic is anticipated'
WIND (the I-80 blow-over regime, §5-7(h))
Blow-over-prone loads must observe light/high-profile closures and 'not travel in strong winds'; graduated classes: 1 = mobile homes + light oversize · 2 = escorted moves · 3 = overwidth · 4 = ALL oversize; no movement under 'no unnecessary travel' or chain law
Curfews
>18' wide: no movement during school-bus/commuter hours on primary/secondary (§5-7(a)(vii))
Validity
'A reasonable period... not to exceed four (4) days'
Routes, ports & facilities
Facility
Rule
Ports of Entry
Permitted OS/OW loads MUST stop at the first PoE ≤5 mi off route — Pre-Pass green does NOT exempt them; on-demand weighing ≤5 mi (§31-18-805(c)); 14 WY PoEs + Ft. Collins CO; inbound pre-clearance jweb.dot.state.wy.us
WYO 22 Teton Pass
60,000 lb maximum AT ALL TIMES; NO trailers of any kind Nov 15 – Apr 1
8–10% grades — 'not advisable' for overlength/oversize loads
WYO 130 Snowy Range
Closed ~October – Memorial Day
I-80 winter/wind
Closures to 'light, high-profile vehicles' BIND blow-over-prone permitted loads (§5-7(h)); live layer map.wyoroad.info/511-map
Reduced Speed bridges
5-mph crossing + CAUTION sign on the load
Where these permits come from
If you file yourself, this is the office you are dealing with. Check the linked page — some states issue OS/OW permits through their highway patrol or revenue department rather than the DOT.
W.S. §§31-18-801–808 + §31-5-919 (wyoleg.gov Title 31 PDF incl. Laws 2025; no 2025/2026 acts · whp.wyo.gov · in effect since 2025-04-30. Fees and rules change; the linked document is always the authority.
Other states
Colour shows how each state prices a permit. Alaska, Hawaii and DC are not served.
