Oklahoma Oversize Regulations: Permits, Escorts, and Fines

Oklahoma oversize load permits are required from the Oklahoma Department of Transportation (ODOT) before any vehicle exceeding 8 feet 6 inches wide, 13 feet 6 inches tall on county roads (14 feet on interstates and state highways), the length limits for its configuration, or 80,000 pounds gross weight travels on state roads. The permit must be in hand before the load moves, and violations carry mandatory fines that a judge cannot reduce.

What Triggers a Permit

A permit is needed any time a vehicle or its load crosses one of the legal thresholds. Width is capped at 102 inches (8 feet 6 inches), measured at the widest point of the vehicle and cargo combined.¹

Height depends on which road you use. County roads allow 13 feet 6 inches. Turnpikes, interstates, U.S. highways, and state highways allow 14 feet. Anything taller requires a permit that names the specific highways the vehicle may use.¹

Length limits vary by rig. A single truck may run up to 45 feet overall, bumpers included. On the National Network of Highways (interstates and four-lane divided federal-aid primary routes), a semitrailer behind a truck-tractor can be up to 53 feet. On roads outside that network, neither trailer in a double-trailer combination may exceed 29 feet.¹

Weight has three ceilings, and hitting any one triggers a permit. Single axles are limited to 20,000 pounds. A tandem axle group (two axles spaced roughly 4 to 8 feet apart) is capped at 34,000 pounds.² For most five-axle tractor-trailer combinations, gross weight tops out at 80,000 pounds under the federal bridge formula, which limits how much weight can sit on a given axle spacing. A truck under 80,000 pounds gross can still be overweight if too much of that load rides on a short axle group.³

Types of Permits and How to Apply

ODOT’s Size and Weight Permits Division issues the permits, and they must be secured before the load moves.⁴ Three permit categories cover most situations:

Single-trip permits authorize one movement of an oversize or overweight load and are the standard choice for irregular hauls.
Annual permits allow repeated travel on designated routes when a vehicle’s dimensions stay consistent, so a carrier does not file fresh paperwork for each trip.
Longer combination annual permits cover double-trailer configurations that exceed 80,000 pounds but stay under 90,000 pounds.⁵

The application asks for weight distribution, axle spacing, and a planned route. Loads at the heavy or wide end of the scale may need a bridge analysis from ODOT’s Bridge Division, and those requests must be submitted at least five working days before the planned move.⁶

Permit Fees

Fees depend on whether the load is oversize, overweight, or both:

Oversize only: $20
Overweight only: $40, plus $10 for each 1,000 pounds over the legal limit
Both oversize and overweight: $80, plus $10 for each 1,000 pounds over the legal weight limit
Longer combination annual (doubles between 80,000 and 90,000 pounds): $20

⁵

The per-thousand-pound charge adds up quickly. A load 20,000 pounds over legal weight brings an extra $200 in weight surcharges on top of the base fee, and loads heavy enough to need a bridge review add engineering time and cost.

When You Can Move the Load

Oklahoma restricts the hours and days that oversize permits are valid, and the rules split between oversize and overweight-only loads.

Daylight Only for Oversize

Any load qualifying as oversize (over the legal width, height, or length) may travel only between 30 minutes before sunrise and 30 minutes after sunset, seven days a week. Overweight-only loads can request continuous 24-hour travel when ordering the permit.⁴

Rush-Hour Curfews in Three Counties

In Cleveland, Oklahoma, and Tulsa counties, oversize loads are banned from the interstate system Monday through Friday from 7:00 a.m. to 9:00 a.m. and again from 3:30 p.m. to 6:30 p.m. Overweight-only loads are not subject to these curfews.⁴

Oversize travel is also not allowed on major holidays, and ODOT can layer additional restrictions for construction zones, special events, or emergencies. Check the route before dispatching.

Escort Vehicles, Flags, and Signs

Escort requirements scale with the load’s dimensions and the type of road.

Escorts by Width

Over 12 feet through 14 feet wide: one front escort on two-lane and super two-lane highways; one rear escort on multi-lane highways.
Over 14 feet wide: front and rear escorts on two-lane and super two-lane roads; at least a rear escort on multi-lane highways.
Over 16 feet wide: front and rear escorts on every road, regardless of type.⁶

Escorts by Length and Height

Any vehicle combination over 100 feet long needs two escorts on two-lane and super two-lane highways. Loads 15 feet 9 inches or taller require front and rear escorts, and the carrier must contact every public utility and railroad along the route so overhead clearances can be checked in advance.⁶

Equipment on Escorts and the Load

Escort vehicles need amber flashing lights, “Oversize Load” signs, and a height pole for tall loads. Escort operators must be properly certified and must keep two-way radio contact with the load driver. The towing vehicle itself needs an “Oversize Load” sign on the front, and the rear of the load (or the rearmost towed vehicle, whichever extends farther) must carry a sign and warning flags.⁶

Federal rules govern the flags themselves. Loads projecting more than 4 inches beyond the vehicle’s sides or more than 4 feet beyond its rear need warning flags: one flag for a side projection of two feet or less, two flags if wider. Flags must be red or fluorescent orange and at least 18 inches square, positioned at the load’s maximum width.⁷ Missing or misplaced signs and flags can trigger a permit violation on their own.

Fines and Other Consequences

Oversize and overweight violations are misdemeanors in Oklahoma, and the fine schedule under Section 14-119 is mandatory. Judges cannot reduce or suspend the amounts.

Overweight Fines

1 to 2,000 pounds over: $100
2,001 to 3,000 pounds over: $200
3,001 to 4,000 pounds over: $400
4,001 to 5,000 pounds over: $600
5,001 pounds or more over: $1,000⁸

Oversize Fines

Width, height, and length violations escalate with repeat offenses: $100 for the first, $200 for the second, and $400 for a third or subsequent violation.⁸

Beyond the Ticket

A carrier that assists or encourages an overweight violation can face a separate fine of up to $500 per load from the Oklahoma Corporation Commission when gross weight exceeds the legal limit by more than 5,000 pounds. Repeat offenders draw closer regulatory attention, and permits can be suspended or revoked. If an overweight or improperly permitted vehicle damages a bridge or road, the responsible party can be held liable for repair costs that may run into hundreds of thousands of dollars. Weight enforcement uses weigh stations, portable scales, and weigh-in-motion sensors, and a truck that exceeds legal weight at a checkpoint may have to offload before continuing.

1
Justia. Oklahoma Code Title 47 – Width, Height and Length of Vehicle and Load
2
Justia. Oklahoma Code Title 47 Section 47-14-109
3
Federal Highway Administration. Bridge Formula Weights
4
Oklahoma.gov. Oklahoma Size and Weight Permits
5
Oklahoma.gov. Permit Fees Addendum to 730 Chapter 50
6
Department of Public Safety. Title 595 Department of Public Safety Chapter 30 Size and Weight Permits
7
eCFR. 49 CFR 393.87 – Warning Flags on Projecting Loads
8
Oklahoma Public Legal Research System. Oklahoma Statutes Title 47 Section 14-119 – Load Capacity Violations – Penalties