How to Read an Oklahoma Oversize Permit: Field-by-Field Guide

An Oklahoma oversize or overweight permit is short on decoration and long on conditions. The dimensions, the route, the travel window and the escort rules are all on it, but some of what binds the load is not printed on the page at all: under OAC 730:50-3-2, the permit consists of the information you supplied, the conditions stated on it, and the applicable state rules and statutes.

This guide walks through what an Oklahoma permit holds and the state rules behind each part, so a driver or dispatcher knows what to check before the wheels turn. Every rule below links to its source. Where the rules leave something open, the answer is the same: read your permit and call the permit office.

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Who issues Oklahoma oversize permits

Oklahoma OS/OW permits come from the Size and Weight Permit Division of the Oklahoma Department of Transportation (ODOT). OAC 730:50-3-3 says a permit is applied for and obtained from that division, in person, by phone or through the ODOT website. Online applications run through OkiePROS, which ODOT’s OkiePROS account profile application describes as ODOT’s online OS/OW permitting system; a company profile has to be set up before you can order.

Two other agencies come up, and neither issues the permit:

• Oklahoma Highway Patrol Troop S (Department of Public Safety) enforces size and weight law and provides law-enforcement escorts for some superloads. Its Oklahoma Highway Patrol Troop S Size & Weight page sends permit questions back to the ODOT permit division.
• The Oklahoma Corporation Commission handles IRP, IFTA and intrastate authority questions, according to ODOT’s Size and Weight Permits page. Those are separate from an OS/OW permit.

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The top of the permit: number, dates and permit type

Start at the top. You should find the permit number (for example OK-XXXXXXX; we never show real ones), the carrier it was issued to, and a start date and end date. ODOT’s user guide for the online permit system describes the Start Date as the date the permit becomes valid and the End Date as the last date it can be used.

Check three things here:

• Duration. Under OAC 730:50-3-2, a single trip permit lasts up to five consecutive calendar days. Multi-trip and annual permits exist for specific cases and have their own limits.
• Permit type. The online system offers types such as Oversize and Oversize Overweight, plus manufactured home, house and special purpose types. A load that is both oversize and overweight needs one permit covering both (OAC 730:50-5-3).
• Route Approval number. If the permit was created from a 30-day Route Approval, ODOT’s Route Approval instructions say its RA number appears at the top of the permit, below the QR code.

Keep the permit with you. OAC 730:50-3-2 says it must be carried in the driver’s possession, and OAC 730:50-5-3 bars a permitted vehicle from interstate and state highways unless the signed original, or a true and correct copy, is in the driver’s possession.

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Vehicle, load, dimensions and weights

The middle of the permit describes what is moving. OAC 730:50-5-3 requires permits to identify the vehicle owner’s name and address; the vehicle’s make, model, license number and state; the number of trailers with their license numbers and states; a brief load description; and, if oversize, every oversize dimension plus any front or rear overhang. If overweight, it must show the gross permitted weight, the number of axles, the axle configuration, and the spacings and weights.

Two reading tips from ODOT’s user guide for the online permit system: dimensions are entered in feet-inches, so 16-6 means 16 feet 6 inches, and axle weights are listed in kips, where 1 kip is 1,000 pounds. An axle shown as 20 is 20,000 pounds, not 20 pounds or 20 tons.

Context for those numbers:

• ODOT’s Size and Weight Permits page says a permit is needed for anything over 13'6" high or 8'6" wide, with length depending on the vehicle type.
• OAC 730:50-5-6 limits loads to 16 feet wide on any part of a trip that uses the Interstate system, and requires the load to clear every overhead structure on ODOT’s vertical clearance map by at least 2 inches.
• OAC 730:50-5-4 requires overweight permits above 80,000 pounds on the Interstate and above 90,000 pounds on other state highways, or when Federal Bridge Formula B is exceeded.
• No tolerances. OAC 730:50-5-3 says no permit tolerances apply, so the numbers on the permit are the ceiling.

Our guide to reading overweight permit axle weights covers axle groups and spacings in more detail.

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The route section

The route is the list of roads the load may use, in order. OAC 730:50-3-2 defines a permit as authority to move the load when the route is the safest practical routing, and OAC 730:50-5-3 adds that overweight single trips go by the shortest practicable routing. A return trip of the same overweight load needs another permit.

When the application is built online, the system generates a route and lists restrictions based on the vehicle’s dimensions (ODOT’s user guide for the online permit system). Applicants must read the “Estimated Restrictions” and agree to follow them before completing the application (ODOT’s Route Approval instructions). On the printed permit, read the route line by line, mark every turn, and note any bridge or restriction notes attached to it.

Stay on it. OAC 730:50-5-3 says failing to follow any permit term, including routes of travel, may immediately invalidate the permit. Turnpikes are run by the Oklahoma Turnpike Authority, and OAC 730:50-5-10 makes ODOT’s permit rules apply there only with that authority’s approval, so check whether your permit actually authorizes any turnpike segment.

Overweight moves that need a load route review must reach ODOT at least five working days before the move (OAC 730:50-5-1, OAC 730:50-5-4), and more time may be needed where several bridges are involved.

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Escorts and pilot cars

Oklahoma’s escort thresholds are in OAC 730:50-5-18. They depend on dimension and road type:

Your permit can require more than this table, so treat the escort lines on the permit as the final word. Other rules to know:

• Escort vehicles must carry the equipment in OAC 730:50-5-16, including red flags, an “Oversize Load” sign at least 10 inches high, an amber beacon or light bar, a two-way radio, STOP/SLOW paddles and, for loads 15'9" or taller, a height pole.
• Escort drivers for hire must be certified by ODOT, or hold a certification from a state with a reciprocal agreement (OAC 730:50-5-17).
• Loads that need escorts may not travel in convoy (OAC 730:50-5-3).
• For superloads that may need a Highway Patrol escort, the Oklahoma Highway Patrol Troop S Size & Weight page says a contract through the permit division is often required and the process can take two to four weeks.

For how escort lines read across permits generally, see oversize permit escort requirements.

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Travel times and metro curfews

Under 47 O.S. § 14-101, oversize permitted loads move during daylight hours only, defined as half an hour before sunrise to half an hour after sunset. A vehicle permitted solely for overweight is exempt and, per ODOT’s Size and Weight Permits page, may travel continuously. ODOT may endorse an individual oversize permit for night travel for good cause; if your permit has no such endorsement, you run daylight only.

OAC 730:50-5-1 adds rush-hour curfews on the Interstate system in three counties:

• Oklahoma County, Tulsa County and Cleveland County: no oversize movement on Interstates from 7:00 to 9:00 a.m. or from 3:30 to 6:30 p.m., Monday through Friday. ODOT’s page gives these times in Central Time.
• In Cleveland County, the two-mile stretch of I-35 between State Highway 9 East (Exit 108) and State Highway 9 West (Exit 106) is exempt.

The same rule says these restrictions do not apply to overweight-only vehicles, special combination vehicles or longer combination vehicles. It also tells operators to stop when weather, traffic or road conditions become dangerous, and lets the state restrict movement in those conditions. Our curfew and travel restriction checklist shows how to mark these windows on a trip plan.

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Holidays and weekends

47 O.S. § 14-101 bars permitted vehicles from moving at any time on six holidays:

• New Year’s Day (January 1)
• Memorial Day (last Monday in May)
• Independence Day (July 4)
• Labor Day (first Monday in September)
• Thanksgiving Day (fourth Thursday in November)
• Christmas Day (December 25)

The same statute says permitted loads may move on Martin Luther King Jr. Day, Presidents’ Day and Veterans Day.

Weekends: neither the statute nor OAC 730:50-5-1 sets a general Saturday or Sunday ban, and the weekday metro curfews apply Monday through Friday. Daylight-only limits still apply every day. Neither source says how a holiday that falls on a weekend is handled, so if your trip touches a holiday weekend, check the permit’s restriction text and confirm with the permit office.

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Signs, flags and lights

OAC 730:50-5-15 sets the marking rules for oversize loads:

• “Oversize Load” sign: yellow background, black letters, at least 5 feet long and 14 inches high, with letters at least 8 inches high. One goes on the front of the towing vehicle and one on the rear of the load or towed vehicle, whichever extends farther. Do not display it when the vehicle is at legal dimensions.
• Warning flags: solid red or fluorescent orange, at least 18 by 18 inches, on the corners and extremities of overwidth and overlength loads, and on any load that overhangs the rear by 4 feet or more.
• Lights and equipment: OAC 730:50-5-1 points to 47 O.S. §§ 12-201 through 12-415 and federal rules in 49 CFR Part 393 for brakes, drawbars and lighting.

Escort vehicles have their own sign, flag and amber light rules in OAC 730:50-5-16; blue lights are prohibited and red or white rotating lights are not authorized.

MI 09

Restrictions, changes and revocation

Read any restriction or condition text on the permit as carefully as the route. A few state rules shape what you can and cannot do with it:

• Changes are limited. OAC 730:50-5-1 says permits will not be revised to change the load description or dimensions, multi-trip and annual permits cannot be changed, and only one revision is allowed per permit, at the permit office’s discretion.
• Event closures. OAC 730:50-5-18 allows highways and areas to be closed to permitted loads for a limited time because of events.
• Lane position. Permitted loads keep right of center and yield to other traffic, except on bridges where the permit says to travel on the centerline (OAC 730:50-5-3).
• Revocation. Under OAC 730:50-3-2, a Department of Public Safety officer or authorized ODOT employee who finds a violation can revoke the permit, and the load may not move again until it is covered by a proper permit.

ODOT’s Size and Weight Permits page also links a current restriction list and maps, including the bridge data and the red/green map that OAC 730:50-5-4 describes for overweight routing.

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Where to find the issuing office

The ODOT Size and Weight Permit Division lists on ODOT’s Size and Weight Permits page:

• Main office: 200 NE 21st Street, Oklahoma City, OK 73105
• Phone: 405-425-7012
• Email: swpermits@odot.ok.gov
• Field locations: Tulsa, Elk City and Enid. The addresses on ODOT’s page differ from some in OAC 730:50-3-3, so call before driving to one.

OAC 730:50-3-3 says permit offices are open Monday through Friday except state holidays, and that phone applications are taken 8:00 a.m. to noon and 1:00 to 4:30 p.m. Questions about a Highway Patrol escort go to Troop S at 405-521-6060, which ODOT’s page also lists.

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A pre-trip checklist, and where JaloPermit fits

Before departure on an Oklahoma permit, confirm:

1. The start and end dates cover the whole trip, and the original or a true copy is in the cab.
2. Every dimension and axle weight on the permit matches the actual load, with weights read in kips.
3. The route is marked turn by turn, including any turnpike segment and bridge notes.
4. The escort count and position match the permit for every road type on the route.
5. The plan avoids the Oklahoma, Tulsa and Cleveland County Interstate curfews and runs daylight only unless the permit says otherwise.
6. No travel falls on one of the six no-move holidays.
7. Signs and flags are mounted per OAC 730:50-5-15.

JaloPermit can speed up the reading part. Drop an already-issued, text-based permit PDF into the permit decoder on the JaloPermit homepage and it lays out the route, escorts, curfews, dimensions and limits on one route card, with weigh stations, truck stops and low-bridge alerts. Then compare it with the original. For the state rules at a glance, see the Oklahoma page in the JaloPermit Atlas, and for a general walk-through of any state’s permit, see how to read an oversize load permit. Running through more than one state? Read multi-state oversize permit trips, and see what belongs in a trucking permit book.

JaloPermit, which publishes this guide, is a reading aid for issued permit PDFs. It is not a permit-filing service and it does not plan routes or provide navigation. The issued permit always wins.

JaloPermit reads text-based PDFs only, not scans or photos. Guests get three free decodes a day with no account and no card. Logged-in users get 10 free decodes a day. After those free decodes, each one is $3.50. There is no subscription.

Questions about how JaloPermit reads a permit? Email support@jalopermit.org.

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FAQs