WyomingOversize & overweight permits.

Anything over the routine Class B/C limits is a Class A superload:

• Routine limits: 18′ wide, 17′ high, 120′ overall, 160,000 lb gross
• Approved only by the WHP Overweight Loads Office (OWL); request through the OWL on the WHP website
• OWL approves Monday–Friday, 7:30 a.m.–4:30 p.m.; closed weekends and holidays
• Over 18′ wide or 18′ high: give at least 24 hours' notice; tell the OWL about delays

Some moves need a full study of the proposed route first:

• Allow 72 hours or more for the study
• Over 125 tons (250,000 lb) or allowable weights: routing and structure analysis may be required, and the state's costs are paid before the permit issues
• Axle setups not in the Maximum Allowable Table need OWL approval and may go to the WYDOT Bridge Program

Loads over 26′ wide are not authorized on state highways where the roadway is mostly 32′ wide or less; the OWL may allow short distances if safety concerns can be addressed.

Wyoming permit fees are set by statute and rule:

• Oversize: $25, plus 3¢ per foot (or fraction) per mile for anything over 15′ wide, 15′ high or a 75′ single unit
• Overweight: 6¢ per ton (or fraction) over legal per mile, $40 minimum
• Permits run for the time needed, up to 4 days; date extensions come from the issuing authority

The permit holder must contact city and county officials for approval to use their roads.

Over 17′ high on any highway, the front pilot car carries a height-measuring device; the issuing office may also require a height escort at 17′ or less.

On two-lane primary and secondary roads, run one front and one rear pilot car when the load is:

• 14′ wide or more
• 110′ overall or longer
• Crossing the centerline at any point
• WHP may add pilot cars for wider loads

On Interstates and divided highways, one rear pilot car at 15′ wide (also on four-lane roads with a center turn lane) or at 150′ long.

• Mixed routes: one pilot car on the Interstate, two on the two-lane stretches
• Exception: an Interstate move may use up to 5 miles of two-lane road to reach a port of entry without adding the two-lane escorts

A rear pilot car is required on all highways for:

• Rear overhang of 25′ or more (measured from a qualifying rear-impact bumper, or the last tire)
• Any overweight move with special OWL restrictions; the OWL may add more

A licensed single motor vehicle (no motorcycles or combinations), equipped with:

• Revolving or strobe amber light, or two 4″+ flashing amber lights, visible 1,000′ front and rear
• OVERSIZE LOAD sign (same spec as the load) only while escorting
• Red or fluorescent orange flags on staffs at each end of the sign
• Headlights and taillights on
• Two-way radio with the load; cell or satellite phones do not count
• Triangles, spare signs and flags, 5-lb BC fire extinguisher (10-lb BC for hazmat loads)

Pilot cars run about 1,000′ from the load unless closer is needed for control, and:

• The move pulls to the shoulder when traffic backs up behind it and stays off until traffic clears
• When safety dictates, stop and pull off before narrow bridges or other hazards; the pilot car goes past and holds oncoming traffic
• Pilot cars stay in their lane; never force oncoming traffic off the road
• Stay on the permitted route and follow permit speed limits
• Do not park on the road or shoulder except in an emergency or to pass an obstacle

Escorted loads may travel together only within these limits:

• Two-lane: two loads, each no more than 16′ wide and 110′ long and under 16′ high; one pilot car ahead of the first and one behind the second
• Interstate/four-lane: two loads, each no more than 18′ wide and 130′ long and under 16′ high; one pilot car behind the second
• A third load stays at least ½ mile back with its own pilot cars
• Four loads without a height pole may run as two groups at least ½ mile apart
• Emergency moves needing escorts may not convoy outside daylight hours

Oversize moves display OVERSIZE LOAD signs front and rear: yellow background, at least 60″ wide by 10″ high, black letters at least 8″ high with 1″ strokes, one line.

• Keep signs clean and clear of lights, reflectors and plates
• Take signs down once the load is legal size or the move is done
• Headlights and taillights on during the move

Red or fluorescent orange flags mark an oversize load:

• Each front and rear corner when over legal width
• Any side extremity wider than the front or rear
• Rear overhang of 4′ or more: one flag if the overhang is 2′ wide or less, two if wider

Loads cleared to run after dark need:

• Overlength: red lamp and red reflector on each corner, visible 1,000′ from sides and rear
• Overwidth: amber clearance lights on front corners, red on rear corners and any projection
• Overwidth also: revolving or strobe amber light, or two 4″+ flashing amber lights on the vehicle, visible 1,000′

When WYDOT designates a bridge Reduced Speed, carry a yellow 60″ × 10″ sign on the rear: CAUTION: This vehicle must slow down to 5 mph to cross bridges.

The permit does not guarantee clearance. The permit holder checks the route, notifies utilities to lift wires, and pays unless the wires are lower than regulations require.

• If you damage the road or a structure: stop, call WYDOT or WHP, and fix the cause
• Check weather and size and weight restrictions before and during the move

Every permitted load stops at the first port of entry within 5 miles of its route, and at any port a sign directs, unless the issuing authority approves an exception shown on the permit.

No permit or permission is issued without proof of valid base plates or registration, a valid USDOT number and proper regulatory authority when required.

Commercial vehicles stop at a port of entry on entering Wyoming, and a PrePass green light does not let an oversize or overweight load bypass it. Have ready:

• IFTA license
• Wyoming registration or IRP with Wyoming at the correct weight
• USDOT number for interstate moves, before the move
• Wyoming operating authority for intrastate moves, before the move: (307) 777-4850

Instead of Wyoming registration or fuel-tax licensing, carriers can buy 96-hour trip permits at a port of entry on entering the state.

• Registration: $20 per single unit, or $40 per legal combination with one power unit
• Fuel: $7.50 per single unit, or $15 per legal combination with one power unit

Carry the permit with the vehicle it covers and show it on request. Changing any word or figure on it voids it.

Class D extended-period permits run up to one year for vehicles without a load or with non-divisible loads, within the Class D limits:

• Oversize: up to 12′ wide, 15′ high, 75′ single unit; $50
• Overweight Class D: up to 6 months and 5,000 miles, $40 minimum, with the original tracking sheet unless exempt
• Issued to specific equipment by VIN or serial number
• Not available for transportable homes

Transportable homes (manufactured, modular and prebuilt) cannot get extended-period (Class D) permits and must obey high-wind closures.

• Class D extended-period permits are not authorized for transportable homes
• Mobile homes fall under Class 1 wind restrictions

These count as part of a non-divisible load (allowances):

• Combination units: up to 2,000 lb combined of dunnage, load securement gear, load safety equipment and hand tools
• One OEM and one non-OEM outrigger pad per outrigger, secured
• The crane maker's own jib boom, folded on the main boom as designed
• One headache ball or one hook block secured in the maker's cradle

Wyoming farmers and ranchers moving their own implements or produce may exceed legal width and height in daylight without a permit; non-Wyoming farmers and ranchers need an oversize permit.

• Over 18′ wide or 17′ high: OWL approval, (307) 777-4376
• Over 16′ wide or over the centerline: pilot cars
• Overlength or overweight: permit required
• Implement dealers are exempt for width and height only
• Contact city and county officials for their roads

Class E and F permits cover seasonal commodities:

• Class E: forest products to 112″ wide; baled hay, corn stalks or combine headers to 150″ wide; 15′ high; no single piece over 102″
• Class F: forest products, sugar beets, gravel, livestock and farm products that can't be weighed at loading; up to 10% over axle and 5,000 lb over gross; not on Interstates
• $15 single trip or $50 for 90 days

Class W annual permits let divisible multi-piece loads exceed 117,000 lb on primary and secondary highways only.

• Apply through the Overweight Loads Office; $100 non-refundable application fee
• Power unit must hold 25 mph on a 5% grade fully loaded
• Vehicle registered in Wyoming for at least 117,000 lb
• Canceled after three violations in 12 months
• No conditional or unsatisfactory safety rating; eligible one year after getting a USDOT number