By Evan Reid, Founder of Haul Handbook · Updated Sep 27, 2026
Wyoming oversize and overweight permits come from the Wyoming Highway Patrol: ports of entry and highway shops for loads within the Class B and C limits (18 feet wide, 17 feet high, 120 feet long, 160,000 pounds gross), and the Overweight Loads Office in Cheyenne for anything bigger. A single-trip oversize permit costs 25 dollars plus 3 cents per foot per mile beyond 15 feet wide, 15 feet high or 75 feet long, and an overweight permit is 6 cents per ton per mile on the excess with a 40 dollar minimum. Legal limits are 8 feet 6 inches wide and 14 feet high, and gross weight can reach 117,000 pounds on the interstate under the Table I bridge formula.
Wyoming legal limits (no permit needed at or under these)
- Width
- 8.5 ft102 inches on all highways (W.S. 31-18-802(a)(i)). Implements and produce of husbandry may exceed width and height in daylight agricultural operations without a permit.
- Gross weight
- 117,000 lb117,000 pounds is the ceiling reached only under the Gross Weight Table I bridge formula, W = 500[LN/(N-1) + 12N + 36], with enough axles and spacing. On the interstate Table I applies; on primary and secondary highways the operator may choose Table I (up to 117,000 pounds) or the simpler overall-length Table II, which tops out at 80,000 pounds at 48 feet or more between first and last axles. Two consecutive tandems may carry 36,000 pounds each when the first-to-last axle distance is 36 feet or more.
- Length: Heavier trailer first
- In a double, the heavier towed vehicle must be directly behind the truck-tractor when consecutive towed vehicles differ by more than 5,000 pounds.
- Off interstate limits
- Primary and secondary highways: Table I bridge formula up to 117,000 pounds, or Table II by overall axle spread up to 80,000 pounds, at the operator's choice. Vehicles with two consecutive tandems less than 22 feet from first to last axle must use Table I. The WYDOT director may post lower limits on specific highways or bridges, and county commissioners may adopt the state limits for county roads.
Axle weight limits
Gross weight is one ceiling; each axle group carries its own limit, and a load can be legal on gross weight yet overweight on an axle. Exceeding any of these needs an overweight permit.
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Permit fees
- Single trip
- $25 (A single-trip oversize permit is 25 dollars, plus 3 cents per foot or fraction per mile for any dimension beyond 15 feet wide, 15 feet high, or 75 feet long for a single vehicle (W.S. 31-18-804(f)). An overweight permit is 6 cents per ton or fraction of excess weight per mile, never less than 40 dollars (W.S. 31-18-804(g)). Permits run for a reasonable period, not more than four days. Loads over 80 tons pay the state's route, structure and escort-personnel costs before the permit issues; the rule sets the analysis trigger at 125 tons (250,000 pounds).)
- Annual eligibility
- Class D extended-period permits run up to one year for vehicles without load or with non-divisible loads (and trailers carrying recreational boats) within 12 feet wide, 15 feet high, and 75 feet long for a single vehicle; the oversize fee is 50 dollars and overweight Class D permits pay the 6 cents per ton-mile charge on declared mileage with a 40 dollar minimum. Class D permits are issued to specific VIN-listed equipment, overweight ones carry a tracking sheet, and they are not available for transportable homes. Other extended permits: forest products, baled hay or combine headers for up to 90 days (50 dollars) or one year (200 dollars); overweight farm, forest, sugar beet, gravel and livestock hauls off the interstate for 90 days (50 dollars); prefabricated buildings, panels and trusses for one year (400 dollars); commercial moves of oversize motor homes, house trailers or truck campers for one year (up to 250 dollars).
Single-trip permit fee schedule
A single-trip permit stacks a base fee with a weight-tiered maintenance fee, and the heaviest loads add a supervision fee.
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To price a specific load, try the oversize permit cost estimator, or compare every state on the national oversize permit table.
To see how these fees combine on real loads, walk through Wyoming oversize permit cost worked examples.
Escort thresholds
What the escort itself has to be
Hitting the threshold is only half of it. The escort vehicle, its equipment, its driver's certification and where it rides are all regulated, and the carrier is the one holding the permit when they are not met.
- Minimum requirements
- Escorts keep roughly 1,000 feet from the load unless a shorter distance is needed for control. An escorted load mainly on the interstate may use up to 5 miles of two-lane road to reach a port of entry without the two-lane escort requirement. Moves using both interstate and intervening two-lane highways need one escort for the interstate and two for the two-lane segments.
- Signs and lights
- Oversize loads display OVERSIZE LOAD signs front and rear, yellow background, at least 60 by 10 inches with black letters at least 8 inches high. Loads authorized for night travel need red corner lamps and reflectors (overlength) or amber front and red rear clearance lights plus a revolving, strobe, or two flashing amber lights at least 4 inches in diameter (overwidth).
Escort rules beyond the thresholds
Knowing when you need an escort is half of it. These are the Wyoming rules on who may run one, what the vehicle has to carry, and how the move is conducted.
- Minimum requirements
- Escorts keep roughly 1,000 feet from the load unless a shorter distance is needed for control. An escorted load mainly on the interstate may use up to 5 miles of two-lane road to reach a port of entry without the two-lane escort requirement. Moves using both interstate and intervening two-lane highways need one escort for the interstate and two for the two-lane segments.
- Signs and lights
- Oversize loads display OVERSIZE LOAD signs front and rear, yellow background, at least 60 by 10 inches with black letters at least 8 inches high. Loads authorized for night travel need red corner lamps and reflectors (overlength) or amber front and red rear clearance lights plus a revolving, strobe, or two flashing amber lights at least 4 inches in diameter (overwidth).
Conditions attached to every permit
The standing conditions Wyoming writes into the permit itself, which apply whether or not they are printed on your copy.
- Prerequisites
- No permit or permission is given without proof of valid base plates or registration, a valid USDOT number, and Wyoming regulatory authority when required. The IRP manual adds that a vehicle must be registered at the maximum Wyoming weight before an oversize or overweight permit is bought.
- Advance permit
- Permits must be obtained before any oversize or overweight vehicle operates on Wyoming highways; permission may be given by phone to proceed to the nearest permit facility to be weighed and measured.
Travel restrictions
- Daylight only
- Yes (Oversize moves are daylight only, except with Highway Patrol permission; a unit over 60 feet in a combination under 110 feet; a single unit over 60 but not over 75 feet; or a load up to 10 feet wide on the interstate only (with 5 miles allowed on other highways for services or delivery), each properly permitted, signed and lighted. Overweight moves of legal size are not limited to daylight. Loads over 18 feet wide may not use primary or secondary highways during local school bus or heavy commuter traffic.)
- Curfews
- No city or district curfew list is published on the WHP pages we checked or in rule ch. 5; time-of-day limits are set per permit, and permit issuers may restrict moves to daylight hours of minimum traffic.
- Weekend / holiday
- Moves requiring escorts may not travel on New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, or Christmas, nor during local celebrations, from half an hour after sunset the evening before the holiday until half an hour before sunrise the day after. When the holiday makes a three-day weekend, the ban covers the whole weekend.
- Daylight hours rule
- Oversize moves are daylight only, except with Highway Patrol permission; a unit over 60 feet in a combination under 110 feet; a single unit over 60 but not over 75 feet; or a load up to 10 feet wide on the interstate only (with 5 miles allowed on other highways for services or delivery), each properly permitted, signed and lighted. Overweight moves of legal size are not limited to daylight. Loads over 18 feet wide may not use primary or secondary highways during local school bus or heavy commuter traffic.
- Weather
- Oversize and overweight loads may not move when the highway is closed to unnecessary travel or the chain law is in effect. WYDOT issues Class 1 to 4 weather restrictions: Class 1 (mobile homes and light oversize loads, triggered by maintenance 9-4 conditions or a trooper's wind observation), Class 2 (escorted moves), Class 3 (overwidth), Class 4 (all oversize). The restrictions do not apply to loads that are only overweight.
Superload and beyond-permit review
Loads past the standard single-trip permit thresholds get individual state review rather than an off-the-shelf permit.
Class A (super load) permits cover non-divisible loads beyond the Class B and C limits that ports of entry and highway shops can clear: 18 feet wide, 17 feet high, 120 feet long for a combination, 25,000 pounds on a single axle (55,000 pounds with construction or off-road tires), 55,000 pounds tandem, 65,000 pounds triple, and 160,000 pounds gross. Anything larger goes to the Overweight Loads Office in Cheyenne at 307-777-4376.
Class A permits are approved only by the Overweight Loads Office. Loads over 18 feet wide or 18 feet high need at least 24 hours notice, loads over 26 feet wide are generally not allowed on state highways 32 feet wide or less, and a route study can take 72 hours or more.
More Wyoming permit rules
- Single trip fee note
- A single-trip oversize permit is 25 dollars, plus 3 cents per foot or fraction per mile for any dimension beyond 15 feet wide, 15 feet high, or 75 feet long for a single vehicle (W.S. 31-18-804(f)). An overweight permit is 6 cents per ton or fraction of excess weight per mile, never less than 40 dollars (W.S. 31-18-804(g)). Permits run for a reasonable period, not more than four days. Loads over 80 tons pay the state's route, structure and escort-personnel costs before the permit issues; the rule sets the analysis trigger at 125 tons (250,000 pounds).
- Annual permit eligibility
- Class D extended-period permits run up to one year for vehicles without load or with non-divisible loads (and trailers carrying recreational boats) within 12 feet wide, 15 feet high, and 75 feet long for a single vehicle; the oversize fee is 50 dollars and overweight Class D permits pay the 6 cents per ton-mile charge on declared mileage with a 40 dollar minimum. Class D permits are issued to specific VIN-listed equipment, overweight ones carry a tracking sheet, and they are not available for transportable homes. Other extended permits: forest products, baled hay or combine headers for up to 90 days (50 dollars) or one year (200 dollars); overweight farm, forest, sugar beet, gravel and livestock hauls off the interstate for 90 days (50 dollars); prefabricated buildings, panels and trusses for one year (400 dollars); commercial moves of oversize motor homes, house trailers or truck campers for one year (up to 250 dollars).
- Annual permit details: note
- Class D oversize fee 50 dollars (W.S. 31-18-804(d); rule ch. 5, sec. 6(d)); overweight Class D is priced at 6 cents per ton-mile on declared mileage, 40 dollar minimum.
- Escort notes: minimum requirements
- Escorts keep roughly 1,000 feet from the load unless a shorter distance is needed for control. An escorted load mainly on the interstate may use up to 5 miles of two-lane road to reach a port of entry without the two-lane escort requirement. Moves using both interstate and intervening two-lane highways need one escort for the interstate and two for the two-lane segments.
- Escort notes: signs and lights
- Oversize loads display OVERSIZE LOAD signs front and rear, yellow background, at least 60 by 10 inches with black letters at least 8 inches high. Loads authorized for night travel need red corner lamps and reflectors (overlength) or amber front and red rear clearance lights plus a revolving, strobe, or two flashing amber lights at least 4 inches in diameter (overwidth).
- Permit conditions: prerequisites
- No permit or permission is given without proof of valid base plates or registration, a valid USDOT number, and Wyoming regulatory authority when required. The IRP manual adds that a vehicle must be registered at the maximum Wyoming weight before an oversize or overweight permit is bought.
- Permit conditions: advance permit
- Permits must be obtained before any oversize or overweight vehicle operates on Wyoming highways; permission may be given by phone to proceed to the nearest permit facility to be weighed and measured.
- Permit conditions: carried in vehicle
- Every permit is carried with the vehicle and open to inspection; altering any word or figure voids it.
- Permit conditions: non divisible
- Multiple-piece loads over the W.S. 31-18-802 limits are prohibited except as the permit statute allows; oversize vehicles with a proper permit may carry legal or indivisible loads.
- Penalties: overweight fine schedule
- Fines by excess weight: 25 dollars up to 2,000 pounds over, 75 dollars to 4,000, 125 dollars to 6,000, 150 dollars to 8,000, 200 dollars to 10,000, 300 dollars to 12,000, 400 dollars to 14,000, 500 dollars to 16,000, 600 dollars to 18,000, 700 dollars to 20,000, 1,000 dollars over 20,000 plus 200 dollars per additional 1,000 pounds (W.S. 31-18-805(e)).
| Name |
|---|
| Class E oversize permit for forest products, baled hay or combine headers (15 dollars single trip, 50 dollars up to 90 days; loads to 112 inches wide for forest products, 150 inches wide and 15 feet high for hay or headers) |
| Annual forest products, baled hay or combine header permit (200 dollars) |
| Class F overweight permit for forest products, sugar beets, gravel, livestock and agricultural products that cannot be weighed at loading, off the interstate, up to 10 percent over axle limits and 5,000 pounds over Table I (15 dollars for 96 hours, 50 dollars for 90 days) |
| Prefabricated buildings, panels and trusses, one year, up to 162 inches wide and 15 feet high (400 dollars) |
| Custom harvest 90-day permit (50 dollars oversize, 40 dollar minimum overweight) |
| Class W permit for multi-piece loads over 117,000 pounds, primary and secondary highways only |
The Wyoming permit office
- Apply or log in (Wyoming Highway Patrol Electronic Permitting System (CMV E-Permitting))
- wydotpermits.wyo.gov
- Agency
- Wyoming Highway Patrol, Overweight Loads Office (OWL), Cheyenne; ports of entry and highway shops issue permits within the Class B and C limits
- [email protected]
- Hours
- Class A (super load) requests are approved Monday through Friday, 7:30 a.m. to 4:30 p.m.; the office is closed weekends and holidays.
- Note
- Overweight Loads Office lines on the WHP contact page: 307-777-4376, 307-777-4747, 307-777-4920 (fax 307-777-4399). The [email protected] address is printed in the WYDOT Apportioned Plates Manual contact list. Port of entry numbers are listed on the WHP Ports of Entry page. The WHP page also links an online form to request permission to move an oversize load into the state directly to a port of entry.
Legal size and weight limits
Wyoming's legal width and height apply on every highway, and its height line sits above the one common in other states. Length limits vary by configuration, and the statute caps how many units a combination may carry.
Gross weight follows two tables. On the interstate the bridge formula applies, and with enough axles and spacing it reaches a ceiling well above the federal gross figure. On other state highways the operator can choose the bridge formula or a simpler overall-length table, and tandems carry more than in most states.
How the fees work
An oversize single-trip permit pays a base fee plus a per-mile charge for each foot, or fraction of a foot, beyond the width, height, or length thresholds. An overweight permit pays per ton, or fraction of a ton, of excess weight per mile, never less than the statutory minimum. Permits run for a reasonable period capped in statute.
The heaviest loads also pay the state's actual cost for route and structure analysis and the personnel sent with the move, billed before the permit issues. The statute and the rule set different tonnage triggers for that charge, and both are shown.
Extended and commodity permits
The Class D permit runs up to a year for vehicles without a load or with non-divisible loads inside a set envelope, issued to listed equipment. Overweight Class D permits pay the per-ton-mile charge on declared mileage.
Commodity permits cover forest products, baled hay, and combine headers for short or year-long terms, overweight farm, sugar beet, gravel, and livestock hauls off the interstate, prefabricated buildings and trusses, custom harvest, and multi-piece loads on non-interstate highways.
When you need escorts
Escort rules turn on width, length, rear overhang, height, and weight, and they differ by road type. Two-lane routes need escorts front and rear once a load passes the width or length line, while the interstate and divided highways need a rear escort at a larger size. Tall loads run with a front escort carrying a height pole.
Escorts keep a set distance from the load, and a load mostly on the interstate may use a short stretch of two-lane road to reach a port without the two-lane escort rule.
Signs, lights, and travel limits
Oversize loads carry yellow OVERSIZE LOAD signs front and rear in the set size, and loads cleared for night travel add corner lamps, clearance lights, and a rotating, strobe, or flashing amber light. Moves are daylight only unless allowed, escorted moves stop on the listed holidays, and all oversize loads stop when the chain law is on or roads close to unnecessary travel.
Superloads and the Overweight Loads Office
Loads beyond the mid-size class limits need a Class A superload permit, approved only by the Overweight Loads Office in Cheyenne on weekday business hours. The widest and tallest loads need advance notice, very wide loads are generally kept off narrow state highways, and a route study can take several days. Book the review before you commit to a move date.
How to read this page
A value reading "Not confirmed" means we could not verify the figure on an official agency page at review time, so it stays open rather than guessed. Superload moves above the standard permit thresholds get individual review by the state; contact the permit office named on this page. For the rest of the Wyoming permit stack, see Wyoming trucking permits.