Utah Oversize Permits: Fees, Escort Rules, and Superloads

Any vehicle moving on Utah highways that exceeds 8 feet 6 inches wide, 14 feet tall, or 80,000 pounds gross weight needs a Utah oversize permit from the Utah Department of Transportation before it rolls. UDOT’s Motor Carrier Division issues these permits under Utah Code 72-7-406, and the operating rules that come attached (escorts, curfews, signs, lighting, route approval) matter as much as the permit itself.1Utah Legislature. Utah Code 72-7-406 – Oversize Permits and Oversize and Overweight Permits

When You Need a Permit

Utah’s legal size envelope sets the trigger. Without a permit, your vehicle cannot exceed 14 feet tall or 8 feet 6 inches wide.2Legal Information Institute. Utah Admin Code R909-2-4 – Legal Size Vehicle Dimensions Length caps depend on configuration:

  • Truck tractor or straight truck: 45 feet bumper to bumper
  • Semitrailer or full trailer: 53 feet
  • Truck and single trailer: 65 feet bumper to bumper
  • Tractor with double or triple trailers: 61 feet, measured from the front of the first trailer to the rear of the last (tractor excluded)
  • Stinger-steered combination: 80 feet
  • Front overhang: 3 feet from the front of the power unit (4 feet for stinger-steer)
  • Rear overhang: 6 feet from the rear of the bed or body

Weight follows federal caps of 20,000 pounds on a single axle, 34,000 pounds on a tandem, and 80,000 pounds gross.3Utah Legislature. Utah Code 72-7-404 – Maximum Gross Weight Limitation for Vehicles The Federal Bridge Formula sits on top of those caps and can drop your allowable weight based on axle spacing, so a five-axle rig under 80,000 pounds gross can still be illegal if the axles sit too close together.4Federal Highway Administration. Bridge Formula Weights Cross any of these thresholds and you need a permit.

UDOT also draws a line between non-divisible loads (freight that can’t reasonably be broken down, like a bridge beam) and divisible freight, and the distinction affects which permit you can get and which operating rules apply.

Permit Types and Fees

The statutory fee schedule in Utah Code 72-7-406 breaks down by duration and weight:1Utah Legislature. Utah Code 72-7-406 – Oversize Permits and Oversize and Overweight Permits

  • Single-trip oversize only: $25, valid for up to 96 continuous hours
  • Annual oversize only: $75, valid for 365 days
  • Single-trip oversize and overweight: $50, valid for up to 96 continuous hours
  • Annual oversize and overweight: $200 to $450 depending on gross weight bracket
  • Over 125,000 pounds: one cent per mile for each 1,000 pounds above 80,000, minimum $65, maximum $450 per single trip

Semiannual permits run at roughly half the annual rate. One registration requirement catches new applicants: to get any permit authorizing a load over 80,000 pounds, your vehicle must already be registered for a gross laden weight of at least 78,001 pounds.

What You Need to Apply

UDOT runs applications through its online Motor Carrier Permit system. Have everything in hand before you start, because incomplete submissions slow processing.5Utah Department of Transportation. Oversize and Overweight Provisions

For the company: USDOT number, business address, phone, email. For the vehicle: make, year, registered weight, full VIN, and license plate with state and expiration. For the load: total length, width, height, front and rear overhang, and weight on each axle. Every field must match your physical registration documents. A mismatch between the permit and the vehicle at a roadside inspection can void the permit.

Route planning is the step that most often blows up a timeline. You must list your exact origin, destination, and every highway you plan to use so UDOT can check bridge clearances, construction, and weight-restricted roads. Loads moving on dual-lane trailers with axle widths over 10 feet that don’t clear automatic bridge validation get sent to the UDOT Structures Division, and that review can take 14 days or longer.6Utah Department of Transportation. Size, Weight, and Motor Carrier Permitting

Standard single-trip permits without structural review tend to process quickly and come back electronically. Annual permits and superloads take longer. Keep a copy of the permit in the vehicle for the duration of the trip.

Signs, Flags, and Lighting

Operating requirements kick in once the permit is issued. A non-divisible oversize load wider than 10 feet, taller than 14 feet 6 inches, or longer than 105 feet must display “OVERSIZE LOAD” signs 7 feet wide and 18 inches tall, one on the front (bumper or top of cab, facing forward) and one at the rearmost point of the load.7Legal Information Institute. Utah Admin Code R909-2-20 – Oversize Non-Divisible Load Lighting, Signing, and Flag Requirements

Red or orange flags attach to the outer extremities of any load over 10 feet wide, or any load with front overhang over 3 feet or rear overhang over 4 feet. Flags must be clean, intact, and fastened so they wave freely. Loads longer than 92 feet traveling at night need amber lights to the front and sides marking the extreme width and red lights to the rear, spaced every 25 feet along the load.8Legal Information Institute. Utah Admin Code R909-2-15 – Nighttime Travel Provisions

Escort and Pilot Car Requirements

Escort rules depend on load size, road type, and whether you’re moving by day or at night. Table 3 in R909-2-14 governs the full matrix, but the main triggers are these:

Daytime on a freeway, one pilot escort is required for loads over 14 feet wide or 120 feet long. On secondary highways in daylight, that drops to 12 feet wide or 105 feet long. Two pilot escorts are required for loads over 16 feet wide or 16 feet tall on freeways, and over 14 feet wide, 120 feet long, or 16 feet tall on secondary roads. The biggest loads (over 20 feet wide or 175 feet long) need two pilot escorts plus at least two police escorts on any road type.

Night tightens things. Loads over 14 feet wide on freeways or 12 feet on secondary highways need two pilot escorts after dark. Loads above roughly 14 feet wide or 105 feet long with more than 10 feet of overhang on secondary roads cannot move at night at all. Tow trucks towing vehicles under 120 feet total length and 10 feet wide are exempt from the nighttime escort rules.8Legal Information Institute. Utah Admin Code R909-2-15 – Nighttime Travel Provisions Escort requirements apply only to non-divisible loads.

When You Can’t Move the Load

Loads over 12 feet wide, 105 feet long, or 14 feet 6 inches tall cannot travel during weekday rush hours on the Wasatch Front. The curfew runs Monday through Friday, 6:00 AM to 9:00 AM and 3:30 PM to 6:00 PM Mountain Time. The restricted corridors include highways in Weber, Davis, and Salt Lake Counties, highways in Utah County north of I-15 Exit 261, I-80 between Exits 99 and 140, I-84 west of milepost 94, and highways south of the Perry-Willard Interchange at I-15 Exit 357. UDOT can grant case-by-case exceptions for emergencies.

Holiday blackouts are wider. Travel for loads over those same thresholds is prohibited for Christmas, New Year’s Day, Memorial Day, Independence Day, Labor Day, and Thanksgiving. The window starts at 2:00 PM the day before the holiday and runs through sunrise the day after. For Monday holidays, the restriction starts at 2:00 PM Friday, lifts for the weekend (sunrise Saturday through midnight Sunday), then resumes 12:01 AM Monday through sunrise Tuesday.9Legal Information Institute. Utah Admin Code R909-2-13 – Holiday Travel Restrictions

Night travel is allowed with tighter dimension caps than daytime. On secondary highways after dark, loads cannot exceed 12 feet wide; on the interstate system, 14 feet wide. Height caps out at 14 feet 6 inches on all highways at night.

Superloads Over 125,000 Pounds

At 125,000 pounds gross, you enter a different tier. UDOT will only issue single-trip permits for non-divisible loads above this threshold. The fee runs at one cent per mile for each 1,000 pounds over 80,000, rounded up to the nearest 50-mile and 25,000-pound increment, with a $65 minimum and $450 maximum per trip.

Vehicles that exceed the axle weight limits in UDOT’s Table 6 must carry a Structure Transit Evaluation profile sheet, meaning the Structures Division has reviewed every bridge and overpass on the route. That review commonly takes 14 days or more, so a superload move has to be planned well ahead.10Utah Department of Transportation. Overweight Non-Divisible Load Provisions

Fines for Running Overweight Without a Permit

Utah Code 72-7-404 sets a $50 base penalty plus a per-pound surcharge that escalates with the overage. UDOT calculates the fine two ways (gross weight overage and individual axle overage) and uses whichever produces the higher total.3Utah Legislature. Utah Code 72-7-404 – Maximum Gross Weight Limitation for Vehicles

  • 1 to 2,000 pounds over: $50 base fine only
  • 2,001 to 5,000 pounds over: 5 cents per pound on gross weight
  • 5,001 to 8,000 pounds over: 5 cents per pound on gross weight
  • 8,001 to 12,000 pounds over: 5 cents per pound gross, 6 cents per pound per axle
  • 12,001 to 16,000 pounds over: 5 cents per pound gross, 7 cents per pound per axle
  • 16,001 to 20,000 pounds over: 5 cents per pound gross, 9 cents per pound per axle
  • 20,001 to 25,000 pounds over: 5 cents per pound gross, 11 cents per pound per axle
  • 25,001 or more pounds over: 5 cents per pound gross, 13 cents per pound per axle

In practice: a truck 10,000 pounds over gross faces $50 plus $500, for $550. At 30,000 pounds over, the gross calculation alone comes to $1,550, and the axle calculation usually comes in higher. The first 2,000 pounds carry only the flat $50, which creates a false sense of comfort. Once you pass 2,000 pounds, the per-pound charges apply to the entire overage from pound one.

Insurance and ELD Rules Still Apply

Permit holders are still motor carriers under federal law. Minimum liability for vehicles over 10,001 pounds GVWR is $750,000 for non-hazardous freight, $1,000,000 for oil and most hazardous substances, and $5,000,000 for bulk hazardous materials in the highest-risk classifications.11eCFR. 49 CFR Part 387 – Minimum Levels of Financial Responsibility for Motor Carriers Shippers and brokers often require $1,000,000 or more by contract regardless of the federal floor, since the liability exposure from hauling a 150,000-pound piece of equipment across bridge structures sits well above $750,000.

Oversize carriers are not exempt from the federal Electronic Logging Device mandate either. FMCSA’s narrow exemptions cover drivers who log fewer than 8 days in a 30-day period, drive-away-tow-away operations, and vehicles manufactured before model year 2000.12Federal Motor Carrier Safety Administration. Who Is Exempt From the ELD Rule Hauling under a permit, following curfew windows, and running restricted routes does not get you off the ELD rule. If you have to keep records of duty status, you need an ELD unless one of those specific exemptions applies.