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Wyoming Oversize Load Permits and Rules

Wyoming Oversize Load Permits and Rules

WHP permit classes, per-mile fees, escort triggers by road type, port of entry stops, holiday windows and weight-based wind closures

Quick answer

How does a carrier get a Wyoming oversize permit?

Apply in the WYDOT/WHP Electronic Permitting System (EPS) and wait for approval before moving. Loads within 18 ft wide, 17 ft high, 120 ft long and 160,000 lb are cleared by a port of entry or highway shop; anything larger is a Class A superload that only the Overweight Loads Office in Cheyenne approves. An oversize single trip costs $25 plus mileage charges past 15 ft.

Updated October 2026 by the HTS Logistics broker team (FMCSA MC# 1178470).

Checked October 2026; the issued permit controls

Wyoming lets a 60 ft semitrailer run on every highway, 7 ft longer than the 53 ft trailers Utah and Montana allow, a limit grandfathered under the 1991 ISTEA freeze (LSO fact sheet 24FS014) and one of the sharper contrasts in our oversize permits by state guide. Its permits come from the Wyoming Highway Patrol's Commercial Carrier Program, which runs the state's 14 ports of entry and the Overweight Loads Office (OWL) in Cheyenne, under WYDOT Motor Carrier Rules Ch. 5 as revised April 30, 2025.

HTS Logistics books heavy haul across Wyoming as a licensed property broker (MC 1178470): the carrier hauls, and we arrange the EPS permit, the escorts Ch. 5 calls for and the port of entry stop. Wind is what moves the date on a Wyoming plan. WYDOT closes segments to light and high-profile vehicles by weight, so we check wyoroad.info and the commercial vehicle portal again on the morning of dispatch.

When Wyoming requires a permit and how to get one

Wyoming sorts permits into classes (Ch. 5 Sec. 4). Class B and C cover single moves within 18 ft wide, 17 ft high, 120 ft overall and 160,000 lb, and WYDOT told a 2026 legislative interim committee that Class B permits can be self-issued in the EPS when every statutory and routing criterion is met. The 2025 revision removed the old self-issuing Class C procedure, put every class on the WHP website and made approval a condition of any movement (Notice of Intent ARR24-049).

A single-trip permit runs for a reasonable period of up to 4 days, with extensions for illness, weather or mechanical trouble (Sec. 7(c)), and it is tied to one vehicle, load and route: a carrier that changes loads outside Wyoming needs a new permit to come back in, and altering any word or figure voids it (W.S. 31-18-804(j)). Requests without valid plates or registration at the correct weight, a USDOT number and any required authority are refused (Sec. 15(d)), and the permit holder clears city and county roads with those officials (Sec. 8(n)).

Permit office

Issuing office
Wyoming Highway Patrol Commercial Carrier Program: ports of entry and the Overweight Loads Office (OWL)
Address
OWL, 5300 Bishop Blvd., Cheyenne, WY 82009-3340
Phone
OWL (307) 777-4376; WHP Commercial Carrier (307) 777-4312
Hours
OWL Class A approvals Monday–Friday 7:30 AM–4:30 PM, closed weekends and holidays; several ports are staffed 7 days a week
Roads covered
State highways (Interstate, primary and secondary routes WYDOT maintains); city and county roads need local approval

Fees

WHP oversize and overweight permit fees (W.S. 31-18-804; Ch. 5 Sec. 6)
Permit or chargeFee
Single-trip oversize (Class A, B or C) $25
Each dimension over 15 ft wide, 15 ft high or 75 ft single-unit length 3 cents per foot or fraction, per mile traveled
Overweight (Class A, B, C or D) 6 cents per ton or fraction over the statutory limits, per mile; $40 minimum; figured on the greatest excess weight (WHP)
Class D extended period, up to 1 year $50 oversize; overweight $40 minimum at 6 cents per ton-mile on declared mileage
Class E and F forest, hay and farm products $15 single trip (a Class F trip is valid up to 96 hours) or $50 for up to 90 days
Class W divisible loads over 117,000 lb, primary and secondary highways only $100 non-refundable application plus an annual Table 4 fee of $38 to $13,500 by tons over and Wyoming miles
Commercial overwidth motor home, house trailer or camper $250 per year
Annual permits in the statute but not yet in Ch. 5 $200 for forest products, baled hay or combine headers (804(y)); $400 for prefabricated buildings up to 162 in wide and 15 ft high (804(w))
IRP and IFTA trip permits at the first port (registration and fuel, not OS/OW) $20 per unit ($40 maximum) and $7.50 per unit ($15 maximum)

By our arithmetic from the rule, a 16 ft wide load on a 300-mile route pays $25 plus 1 ft x 300 miles x $0.03, or $34.

Heavy loads pay for WYDOT's route, structure and highway-capacity analysis, and for state personnel sent with the move, before a permit issues, but the statute and the rule disagree on where that starts: W.S. 31-18-804(g) says loads over 80 tons, while Ch. 5 Sec. 6(c) says loads over 125 tons (250,000 lb) or allowable weights. We confirm the threshold with the OWL before pricing a load in that range. WHP publishes no amendment, escort, engineering or card fee.

Escort and pilot car rules in Wyoming

Wyoming's escort counts change with the road: Ch. 5 Sec. 8(g)–(k) sets one line for two-lane primary and secondary routes and a wider one for the Interstate and divided highways. On two points the WHP Commercial Carrier page reads differently, leaving height escorts and Interstate length escorts to the approving authority; the table follows the rule in force since April 30, 2025. Ch. 5 and W.S. 31-18 set no escort-driver certification, unlike several states on our pilot car rules by state page.

Wyoming escort triggers (WYDOT Ch. 5 Sec. 8–9)
LoadEscort requirement
14 ft wide or more, or any part left of the centerline, on two-lane primary and secondary routes 2 escorts, front and rear, about 1,000 ft from the load; WHP may add more by width (Sec. 8(g))
15 ft wide or more on the Interstate, divided highways and four-lane roads with a center turn lane 1 rear escort; a move using both the Interstate and two-lane highways needs 1 on the Interstate and 2 on the two-lane legs (Sec. 8(g), 9(m))
110 ft long or more on two-lane primary and secondary routes Front and rear escorts (Sec. 8(h))
150 ft long or more on the Interstate or divided highways 1 rear escort, or as the OWL decides (Sec. 8(h)); the WHP page calls this discretionary
Rear overhang of 25 ft or more, any highway 1 rear escort about 1,000 ft back; overhang is measured from a bumper meeting 49 CFR 393.86, or from the last tire (Sec. 8(i))
Over 17 ft high, any highway 1 front escort with a height-measuring device about 1,000 ft ahead, and one may be required at 17 ft or less (Sec. 8(j)); the rule sets no pole margin over the load
Overweight move with special restrictions from the OWL Rear escort on all highways; the OWL may require more (Sec. 8(k))
Mostly Interstate move that needs up to 5 miles of two-lane road to reach a port of entry Exempt from the two-lane escort count for that stretch (Sec. 8(g))
Two escorted loads traveling together About 1,000 ft apart: on two-lane highways if neither tops 16 ft wide or 110 ft long and both are under 16 ft high; on four-lane highways up to 18 ft wide and 130 ft long (Sec. 9(h)–(k))

A Wyoming escort vehicle is a licensed single motor vehicle, never a motorcycle or combination, with a revolving amber light, amber strobe or pair of flashing amber lights of at least 4 in visible 1,000 ft front and rear; an OVERSIZE LOAD sign at least 60 in by 10 in, shown only while escorting; red or fluorescent orange flags on staffs at each end of the sign; two-way radio contact with the load, which a cell or satellite phone does not satisfy; and a fire extinguisher of at least 5 lb BC rating, 10 lb for hazardous materials (Ch. 5 Sec. 10). Escorts may not leave the travel lane to force oncoming traffic off the road (Sec. 9).

Travel times, curfews and holidays

Oversize loads in Wyoming move in daylight, which Ch. 5 Sec. 2(n) defines as starting one-half hour before sunrise and ending one-half hour after sunset (Sec. 7(a)), and the issuing authority may narrow that to the daylight hours with the least traffic (Sec. 7(a)(vi)).

  • Night exceptions (Sec. 7(a)): moves WHP approves; a single unit over 60 ft inside a combination under 110 ft overall; a single unit alone over 60 ft and up to 75 ft; loads up to 10 ft wide on the Interstate only, with 5 miles of other highway for food, fuel, services or delivery; and emergency or derailment responses. The WHP Commercial Carrier page gives the combination limit as under 100 ft and requires legal height; this page follows the rule, and a carrier near 100 ft confirms with WHP.
  • Overweight only: loads within legal size are not held to daylight (Sec. 7(b)), and snow removal equipment may run 24 hours when a Class D permit says so.
  • Weekends: Ch. 5 sets no weekend ban, so daylight Saturday and Sunday moves are allowed unless a holiday window applies. The OWL is closed on weekends, while several ports of entry are staffed every day.
  • Curfews: there is no statewide rush hour, but loads over 18 ft wide stay off primary and secondary highways during local school bus or heavy commuter traffic as the OWL decides (Sec. 7(a)(vii)). Route memos add local windows: memo 26-029 for W Broadway through the Town of Jackson sets 15 ft wide, 15 ft high and 90 ft long limits, 3 hours' notice to Jackson Police at (307) 733-2331 and no travel 6–9 AM or 4–7 PM.
  • Chain law and travel advisories: no oversize or overweight movement at all under a no-unnecessary-travel advisory or while the chain law is in effect, and a load already rolling may only continue or return to the nearest parking area or town without WHP approval (Sec. 7(h)).
Wyoming no-move windows for escorted oversize loads, 2026 (computed from Ch. 5 Sec. 7(d)–(e))
HolidayNo escorted oversize movement
New Year's Day 2026, a Thursday From a half hour after sunset Wed Dec 31, 2025 until a half hour before sunrise Fri Jan 2
Memorial Day (three-day weekend) From a half hour after sunset Fri May 22 until a half hour before sunrise Tue May 26
Independence Day (Saturday rule) From a half hour after sunset Thu Jul 2 until a half hour before sunrise Mon Jul 6
Labor Day (three-day weekend) From a half hour after sunset Fri Sep 4 until a half hour before sunrise Tue Sep 8
Thanksgiving (that day only) From a half hour after sunset Wed Nov 25 until a half hour before sunrise Fri Nov 27
Christmas (Friday, treated as a three-day weekend) From a half hour after sunset Thu Dec 24 until a half hour before sunrise Mon Dec 28
New Year's Day 2027 (Friday, three-day weekend) From a half hour after sunset Thu Dec 31 to a half hour before sunrise on Mon Jan 4, 2027

WHP publishes no 2026 list; we computed these windows from the rule and treat Friday holidays as three-day weekends, which is our reading of Sec. 7(e)(i). The rule covers only moves that need escorts, is silent on unescorted oversize loads, and also bars escorted moves during local celebrations with heavy traffic, which no published list names. In an extreme emergency, contact WHP (Sec. 7(f)).

Seasonal limits: no Wyoming frost law, but winter shutdowns

Wyoming runs no spring-thaw program: W.S. 31-18 Article 8, W.S. Title 24 and WYDOT Ch. 5 set no seasonal period or reduced seasonal axle weights, and the 77 entries on WYDOT's Size/Weight Restrictions list on Oct 17, 2026 were construction, bridge, tunnel, wire and route limits, none seasonal. Programs in the states that have one are compared on our frost laws by state page.

  • Posted reductions: the WYDOT director may lower axle and gross limits on a specific highway or bridge when continued use would cause undue damage, and size and weight limits when road conditions require (W.S. 31-18-802(a)(viii)–(ix)). Reduced limits are posted (Ch. 5 Sec. 11), and a violator is liable for the damage.
  • Winter weather: beyond the chain-law and no-unnecessary-travel bans, oversize and overweight loads may be restricted on ice- and snow-covered highways, black ice, slick spots and drifted or blowing snow (Sec. 7(h)(i)), which in practice is the Wyoming equivalent of a seasonal limit.
  • County roads: counties may adopt the state size and weight article by resolution (802(a)(x)), and the permit holder clears county and city roads with local officials (Sec. 8(n)); county seasonal postings were outside the sources we checked, so we ask the county road office directly.

What catches carriers in Wyoming

First port of entry, every movement

Every permitted load stops at the first available port of entry not more than 5 miles from its route, on each separate movement, and at any port a regulatory sign directs it to, unless the permit prints an exception. A PrePass truck hauling an oversize or overweight load may not bypass, and a trooper may order a weighing at state scales within 5 miles of the declared route unless the truck was already weighed at a port with the same load.

Ch. 5 Sec. 8(p); W.S. 31-18-805(c); WHP Ports of Entry page

Wind closures go by weight

Since 2023 WYDOT has closed segments in high wind to vehicles at or below a posted gross weight, aimed mainly at enclosed trailers and box trucks, and Ch. 5 requires blow-over-prone loads such as office trailers and transportable homes to obey closures to light, high-profile vehicles. Ignoring one costs $1,000 for a first offense and $2,500 for a second within 3 years, with up to 30 days in jail; WYDOT's Sept 2025 brochure still says up to $750.

Ch. 5 Sec. 7(h); W.S. 24-1-109(d); WYDOT Wyoming Wind FAQ

Signs on every oversize move

Any vehicle or load over legal width, height or length shows OVERSIZE LOAD signs front and rear, at least 60 in by 10 in, with black letters 8 in high and 1 in wide on one line on yellow. The rule names no other wording, and the signs come down once the move ends or the vehicle is back within legal size. Over-width loads add red or fluorescent orange flags at each corner, and a bridge WYDOT designates Reduced Speed adds a rear CAUTION sign telling the driver to slow to 5 mph. Our page on oversize load sign rules in other states shows how the size compares.

Ch. 5 Sec. 8(b), 8(e), 10(d)

One load per permit

Permits are only for loads that cannot be divided without damage. Up to 2,000 lb of dunnage, chains, binders, tarps and hand tools may ride along, and smaller items may share the deck with a permitted one-piece load if they stay inside its dimensions, but never as continuous divisible hauling; other multiple-piece oversize or overweight loads are barred.

Ch. 5 Sec. 2(mm), 4(m); W.S. 31-18-804(q)

Clearance is the holder's job

A Wyoming permit is no promise of clearance. The holder confirms the load passes under wires and structures, notifies the utility when wires must be lifted and pays for it unless the wires hang lower than regulations allow; after any damage the driver stops, notifies WYDOT or WHP, corrects the cause and reimburses WYDOT.

Ch. 5 Sec. 8(m), 8(o), 12

Class A superloads, WYDOT route memos and weather classes

No toll road, toll bridge or toll-authority permit appears in Wyoming's permit materials, and W.S. 31-5-238(a) bars designating an HOV lane as a toll road. The extra steps on a Wyoming move come from the permit class, the route memos WYDOT posts and the weather.

Class A superloads

A non-divisible load becomes Class A once it passes 18 ft wide, 17 ft high, 120 ft overall or 160,000 lb gross, puts more than 25,000 lb on a single axle (29,000 lb within a tandem, 55,000 lb on construction tires at least 18 in wide), 55,000 lb on a tandem or 65,000 lb on a triple, or uses an axle layout missing from the Maximum Allowable Table (Ch. 5 Sec. 2(ppp), 4(b)). Only the OWL approves it. Loads over 18 ft wide or 18 ft high need at least 24 hours' notice, loads over 26 ft wide stay off state highways whose roadway is mostly 32 ft or narrower except short distances the OWL approves, and some route studies take 72 hours or more (Sec. 15(f)).

Class B, C and D envelopes

Class B and C axle groups follow the Maximum Allowable Table, for example a tandem/tandem from 84,000 lb at 8 ft to 110,000 lb at 16 ft. Class D extended-period permits run up to a year for units named by VIN or serial number, within 12 ft wide, 15 ft high, 75 ft single unit and 120 ft overall; overweight Class D permits stop at 6 months and 5,000 combined miles and need an original tracking sheet (Sec. 16).

Route memos on Oct 17, 2026

WYDOT's Size/Weight Restrictions list held 77 entries. Among them: the Wind River Canyon tunnels on US-20/WY-789 cap loads at 18 ft high and 24 ft wide, and loads over 12 ft wide or 15 ft high bring their own traffic control and notify WYDOT at (307) 864-3200 (memo 26-028); WY-22 over Teton Pass bars trailers Nov 15–Apr 1, takes permitted loads Apr 2–Nov 14 only on dry roads and carries a 60,000 lb GVW limit (memos 26-013 to 26-015); I-80 near Patrick Draw (RM 141–155) has a 14 ft width limit from Sep 12, 2026; and overhead wires near Hulett, Aladdin and Sundance hold loads to 19 ft or 20 ft 6 in unless arranged 48 hours ahead at (307) 674-2300. The memos change often, so we recheck them before each move.

WHP weather restriction classes

WHP restricts oversize moves in four classes: Class 1 covers mobile homes and light oversize loads and starts automatically under maintenance '9-4' conditions or when a trooper observes high wind, Class 2 stops escorted moves, Class 3 overwidth moves and Class 4 all oversize moves; none applies to loads that are only overweight. WYDOT 511 defines Strong Wind as gusts of 40 mph, and conditions are posted at wyoroad.info, 511, 1-888-996-7623 and cvop.wyoroad.info.

Crossing into a neighboring state

  • South into Colorado: every extra-legal load, whatever its size, stays off Denver-area highways 6–9 AM and 3–6 PM on weekdays, escort counts follow the highway's color on CDOT's map, and pilot escorts must be certified, all set out in our Colorado oversize permit guide.
  • West into Utah on I-80: permits normally must be in hand before entering Utah, but a westbound load from Evanston can buy one at the Echo port of entry, and the Wasatch Front weekday curfew covers I-80 Exits 99–140; see our Utah oversize permit rules.
  • North into Montana: MDT's eTRIPS single trip is $10, Interstate loads up to 18 ft wide may run around the clock, holidays included, and off the Interstate anything over 10 ft wide moves in daylight only; the details are on our Montana oversize permit page.

Wyoming oversize permit questions

What does a WHP oversize permit cost in Wyoming?

A single-trip oversize permit is $25, plus 3 cents per foot or fraction per mile for each dimension over 15 ft wide, 15 ft high or 75 ft single-unit length (W.S. 31-18-804(f)). Overweight costs 6 cents per ton over the statutory limits per mile, with a $40 minimum. By our arithmetic, a 16 ft wide load on a 300-mile route pays $34. Class D extended permits are $50 for oversize.

When can a Wyoming oversize load run after dark?

Generally not. Oversize loads keep to daylight as Ch. 5 Sec. 2(n) defines it, so the earliest start is 30 minutes before sunrise and the latest stop 30 minutes after sunset (Sec. 7(a)). The exceptions are moves WHP approves, loads up to 10 ft wide on the Interstate, a single unit up to 75 ft, a combination under 110 ft whose single unit tops 60 ft (the WHP page says under 100 ft and legal height) and emergency responses. Overweight-only loads within legal size may run at night.

When does a Wyoming oversize load need an escort?

On two-lane primary and secondary routes, two escorts, front and rear, at 14 ft wide or 110 ft long, or whenever the load crosses the centerline. On the Interstate and divided highways, one rear escort at 15 ft wide or 150 ft long. On any highway, a rear escort for 25 ft of rear overhang and a front escort with a height-measuring device over 17 ft high (Ch. 5 Sec. 8). Wyoming sets no escort-driver certification.

What is a Class A superload permit in Wyoming?

Class A covers any non-divisible load past the Class B and C limits: over 18 ft wide, 17 ft high, 120 ft overall or 160,000 lb, or over the single, tandem or triple axle maximums. Only the Overweight Loads Office in Cheyenne approves Class A permits, Monday to Friday 7:30 AM to 4:30 PM, loads over 18 ft wide or high need 24 hours' notice, and some route studies take 72 hours or more.

Do permitted loads have to stop at Wyoming ports of entry?

Yes. Ch. 5 Sec. 8(p) requires every permitted load to stop at the first available port of entry within 5 miles of its route on each separate movement, and PrePass trucks hauling oversize or overweight loads may not bypass. Carriers without Wyoming credentials buy IRP trip permits at $20 per unit and IFTA fuel permits at $7.50 per unit there, and WHP refuses permits without valid registration and a USDOT number.

Can escorted oversize loads move on Wyoming holidays?

No. Ch. 5 Sec. 7(d) halts escorted oversize moves around Memorial Day, Independence Day, Labor Day, Thanksgiving, Christmas and New Year's Day, from a half hour after sunset the evening before to a half hour before sunrise the morning after, stretched across three-day weekends. WHP publishes no 2026 list; by our reading of the rule, Christmas 2026 runs from sunset Thu Dec 24 to sunrise Mon Dec 28. The rule says nothing about unescorted loads.

Is a 60 ft trailer legal in Wyoming?

Yes. Wyoming allows a 60 ft semitrailer in a tractor-semitrailer on all highways with no overall combination limit, a figure grandfathered under the 1991 ISTEA freeze (LSO fact sheet 24FS014). Doubles are held to 48 ft plus 40 ft, 81 ft combined. A 2024 bill to allow a 53 ft lead trailer in doubles failed, and WHP told the Legislative Service Office that such doubles cannot be permitted.

Sources

Facts on this page were checked in October 2026 against the sources below. Rules and rates change; we confirm current requirements on every move.

  1. eCFR 23 CFR Part 658: Truck Size and Weight (federal baseline)
  2. WHP Commercial Carrier page (size and weight summary, fees, escorts, holidays, contacts)
  3. WHP Ports of Entry page (port phones, PrePass rule, Gold Book rule links)
  4. WYDOT/WHP Electronic Permitting System (login page, port contacts)
  5. WYDOT Trucking / Commercial Vehicles page (OWL phone)
  6. WYDOT Commercial Permits page (link to Application for Permission to Move)
  7. WYDOT Motor Carrier Rules Ch. 5, Size and Weight Limitations of Vehicles (eff. 4/30/2025, copy posted by WHP)
  8. Wyoming Administrative Rules search (Ch. 5 current, ref. 045.0004.5.04302025; no WYDOT proposed rules)
  9. WYDOT Notice of Intent and Statement of Reasons, Ch. 5 revision (ARR24-049)
  10. W.S. Title 31 (compiled May 8, 2026): 31-18-801 to 31-18-808, 31-5-238
  11. W.S. Title 24: 24-1-107 to 24-1-109 (closures, light high-profile vehicle fines)
  12. W.S. Title 31 Article 8, 2021 compilation (for comparison)
  13. WYDOT, Wyoming Oversize/Overweight Permitting Overview (2026 interim committee document)
  14. LSO fact sheet 24FS014, Wyoming and Surrounding States Semitrailer Length Limits (May 2024)
  15. WYDOT Clearances and Restrictions: Size/Weight Restrictions Summary
  16. WYDOT Size/Weight Restrictions JSON feed (77 entries, Oct 17, 2026)
  17. WYDOT 511 Road Condition and Advisory Definitions (wind, no unnecessary travel)
  18. WYDOT 511 Size and Weight Restrictions links
  19. WYDOT Wyoming Wind page and weight-based wind closure FAQ
  20. WYDOT Blow Over Hazards brochure (Sept 2025)

Routing a load through Wyoming?

Ports of entry, wind closures and the WYDOT memo list decide the travel day as much as the permit does. Send us the load's size, what each axle carries and the pickup and delivery points, and we will lay out the permit class, escorts and stops before we book a carrier.

  • FMCSA-licensed property broker, MC# 1178470
  • Permits, escorts and route surveys arranged for each move
  • Carriers checked for authority, insurance and safety record
  • Commercial shippers, dealers, contractors and auction buyers

Prefer to talk? Call (631) 683-8275.

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