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Wyoming Oversize / Overweight Regulations

What is considered as "Oversized Load" in Wyoming?

Dimensions: Width: 8' 6" Height: 14' Truck-Semi-Trailer: 60' Maximum Combination: 85' Overhang:

What is considered as "Overweight Load" in Wyoming?

Weights: Single Axle: 20,000 lb. Tandem axle: 36,000 lb. Tridem: 42,000 lb. Max Gross Weight: 80,000 lb.

Wyoming Oversize / Overweight Permits

Wyoming Permit Department Contact Information


Fax: 307-777-4399

8:00 AM - 5:00 PM Mountain

Wyoming Pilot Cars / Escorts

Escorts for Width: Escorts are required on two lane primary and secondary routes when any portion of the vehicle or load extends to the left of the highway center line or the movement is 14 ft. or greater in width.

Escorts shall be required on interstate and divided highways and four lane roadways with a left turn center lane when the movement is 15' or greater in width. The Wyoming Highway Patrol may require additional escorts depending on load width.

Escorts for Length: On two lane primary and secondary routes, escorts shall be required for movements 110' or more in overall length or for movements that will extend to the left of the centerline at any time during the movement.

On interstate and divided highways, escorts for length will be required at the discretion of the Wyoming Highway Patrol.

Escort for rear overhang: One escort to the rear shall be required for rear overhang of 25' feet or more on all highways.

Escort for Height: Any movement 17' or higher will be required an escort vehicle to the front with a height-measuring device on all highways. Escorts for heights less than 17' will be at the discretion of the permit issuing authority.

Escorts for Overweight: Any overweight movement with special restrictions imposed by the Bridge Department shall require a rear escort on all highways. An additional escort to the front may be required on primary and secondary highways.

Wyoming Axle Regulations

Maximum Legal Weight

Axle Group

Single                               20,000 lb.

Tandem                           34,000 lb.

Tridem                             42,000 lb.

GVW                                 80,000 lb.

Maximum Permit Weight Allowed

Steer Axle                      600 pounds per inch of tire width

Single                               21,500 lb.

Tandem                           43,000 lb.

Tridem                             53,000 lb.

GVW                                160,000 lb.

Wyoming Trip and Fuel (IRP / IFTA) Permits

Trip Permits and Fuel Permits

Owners of commercial vehicles meeting the registration requirements of another jurisdiction may obtain a temporary permit from the department to make a single trip into, within, or out of Wyoming for a period of not to exceed 96 hours for a fee of $20 for each single unit operated as a single unit or $40 for each legal combination of units including only one power unit.

In lieu of the fee required for license and taxation of gasoline or diesel fuels the operator may secure a temporary permit from the department to operate in Wyoming for a period of not to exceed 96 hours for a fee of $7.50 for each single unit operated as a single unit or $15 for each legal combination of units including only one power unit. 

Fuel and registration trip permits can be obtained at a port of entry upon entry into the state.

Wyoming Overweight / Oversize Fines

If over legal size or weight, you must have a permit of permission before operating on any Wyoming State Highway.

If the hauling truck exceeds weight limitations, the truck shall be allowed to unload at its point of destination in this state if the point of destination is within one (1) mile of the truck's location when the illegal weight limitation was determined. No penalty for the first violation will be imposed, but any subsequent violation shall be subject to a penalty.

If you do not comply, fines start at $120.

The uniform schedule for deposits for appearances on commercial vehicle violations are established by court rule or by statutory authority  and includes $20.00 Court Costs + $10.00 Court Automation Fee, and a $10.00 civil legal services fee.

Weight Over Maximum                     Fine

1 - 2,000 lb.                                           $65

2,001 - 4,000 lb.                                   $115

4,001 - 6,000 lb.                                   $165

6,001 - 8,000 lb.                                   $190

8,001 - 10,000 lb.                                 $240

10,001 - 12,000 lb.                               $340

12,001 -14,000 lb.                                $440

14,001 - 16,000 lb.                               $540

16,001 - 18,000 lb.                               $640

18,001 - 20,000 lb.                               $740

Over 20,000 lb.                                    $1040

Running Hours and Holiday Restrictions

Warning Lights

All over width loads require:

Amber clearance lights on each front corner

Red lights on the rear of the load, as well as on each extremity or projection.

An amber rotating, flashing or strobe light is required n the vehicle.

Over-length loads require a red lamp and reflector on each rear corner of extremity of any rear overhang.

"Oversized Load" Banners

All oversize loads require and "Oversize Load" sign on the front and rear of the vehicle/load:black letters on a yellow background

Flag Requirements

For all over-width vehicle/loads, 12" square red or fluorescent orange flags at:

(1) four corners of the vehicle load

(2) at any extremity that is wider than the front/rear of the vehicle/load

(3) rear overhang of 4' or greater: one flag if less than 2' wide, two flags if greater than 2' wide.

Flags, Lights and Banners

Movement of any oversize load shall be made only during daylight hours, except:

A permitted combination unit that does not exceed 110'. 

A single unit that does not exceed 75'.

A load not exceeding 10' wide on Interstate highways only.

An escorted vehicle/loads , more than 10' wide on interstates; more that 8,5' on primary or secondary roads.

Additional restrictions apply to vehicle/loads in excess of 18'.

Wyoming Tire Regulations

Tire chains of reasonable proportions upon any vehicle when required for safety because of snow, ice or other conditions tending to cause a vehicle to skid.

Pneumatic tires having studs designed to improve traction without materially injuring the surface of the highway. Pneumatic tires having studs must be approved by the superintendent.

When the superintendent or his authorized representative determines that travel is sufficiently hazardous due to snow, ice or other conditions travel on a highway may be restricted to use only by motor vehicles utilizing adequate snow tires or tire chains.

A person shall not operate any vehicle when one has a tread depth less than four thirty-seconds (4/32) inch in the case of tires which are used on the front wheels of a bus, truck or truck tractor, or two thirty-seconds (2/32) inch in other cases.

Wyoming Frost Laws

Special Note: Oversize loads are not permitted to travel when a "no unnecessary travel advisory" is issued. An enroute load may proceed to (or return to) the nearest parking area or town. At no time shall the load continue beyond these points unless approved by the Wyoming Highway Patrol.

A partial view of Wyoming's extensive table of restrictions including weight restrictions during periods of spring thaw is shown at:

Wyoming Annual Permits

Wyoming Road Conditions

Expect the Unexpected - It pays to be cautious!

Slow Down - Reaction time is directly related to your speed so take your time in high traffic conditions such as work zones.

Don’t Tailgate - Maintain a safe distance between you and the vehicle in front of you.

Pay Attention to Signs - Be alert for signs indicating a lane change flaggers, or changes in speed.

Obey Road Crew Flaggers - A flagger has the same authority as a posted road sign .

Stay Alert, Reduce Distractions - Turn down the music and stay off your headset while traveling through work zones.

Keep Up with Traffic Flow - Help keep traffic flowing and minimize stops and contested lanes by merging as soon as possible.

Be Patient, Stay Calm - Frustration and impatience can lead to rash decisions and further delays.

Wyoming Manufactured Houses and Mobile homes

Wyoming does not have specific regulations for manufactured homes. Refer to the section on "oversize" loads.

Oversize / Overweight Regulations By State