Legal size limits without a permit
| Measurement | Oklahoma legal limit |
|---|---|
| Height | 13 ft 6 in on county roads; 14 ft on turnpike/interstate/state highways |
| Width | 8 ft 6 in / 102 in |
| Front Overhang | Confirmed at filing |
| Rear Overhang | Confirmed at filing |
Axle and gross weights
How much each axle group and the whole vehicle can carry in Oklahoma, without a permit and with an overweight permit.
| Axle group | Legal limit | With a permit |
|---|---|---|
| Steer axle | Confirmed at filing | Confirmed at filing |
| Single axle | 20,000 lbs (or 600 lbs per inch of tire tread width, whichever is less) | 20,000 lbs (or 600 lbs/inch of tire tread width, whichever is less) |
| Tandem axle | 40,000 lbs (20,000 lbs per axle) | Tandem groups up to 40,000 lbs; triple-axle groups up to 60,000 lbs |
| Tridem axle | Confirmed at filing | Confirmed at filing |
| Quad axle | Confirmed at filing | Confirmed at filing |
| Gross weight | 80,000 lbs | 120,000 lbs under the Annual Envelope Vehicle Permit |
Superload: Any overweight permit load exceeding ODOT's Standard Drawing OL-1 configurations is defined as a superload requiring individual structural analysis
Permit types we file in Oklahoma
Single-Trip PermitValid up to 5 consecutive calendar days.
Annual Envelope Vehicle PermitValid one calendar year; caps at 120,000 lbs gross, 12 ft wide, 14 ft tall, 110 ft long.
Special-Use PermitsIncludes Special Over-height Trailer Permit and Annual Special Manufactured Home Permit.
Maximum dimensions with a permit
| Dimension | Maximum with a permit |
|---|---|
| Length | Up to 110 ft under the Annual Envelope Vehicle Permit |
| Width | Up to 12 ft under the Annual Envelope Vehicle Permit; up to 16 ft on Interstate highways under general oversize permits |
| Height | Up to 14 ft under the Annual Envelope Vehicle Permit |
| Rear Overhang | Up to 30 ft rear overhang (25 ft front overhang) under the Annual Envelope Vehicle Permit |
Oklahoma defines a superload as any overweight load exceeding its Standard Drawing OL-1 configurations, triggering bridge-by-bridge structural analysis.
Escorts and travel restrictions
Escort & pilot car rules
- 1 front escort for loads 12–14 ft wide on two-lane highways.
- 2 escorts (front + rear) for loads over 14 ft wide, or over 16 ft wide on any road.
- 2 escorts (front + rear) for loads 15 ft 9 in or taller.
When you can travel
- Rush-hour ban on Interstate/Defense Highways in Oklahoma, Tulsa, and Cleveland counties.
- Annual Envelope Vehicle Permit voids if operated during hours of darkness.
- House/building structure moves prohibited on Saturday and Sunday.
Signs, flags and lights
Most states require
- An “OVERSIZE LOAD” banner on the front of the truck and the rear of the load.
- Red or fluorescent orange warning flags at each corner and at the widest points of the load.
- Amber warning lights or clearance lights when moving at night, where night travel is allowed.
Oklahoma specifics
- Banner size, flag size and light rules for Oklahoma are listed on your permit.
- We include them in your permit notes so your driver has them before the trip.
Rules change. Limits and requirements are set by ODOT and can change. We confirm the current rules for your exact load before filing.