An oversize permit is not a hall pass. It is a contract with conditions. The state agrees to let one load move over its roads, and you agree to move it exactly as written. Break a condition and the permit may no longer cover you. The load is then treated as if it had no permit at all.

Layouts differ by state, but most permits carry the same building blocks. Here they are, with examples from Pennsylvania, Florida and Minnesota.

Permitted dimensions and weights

Every permit lists the width, height, length, overhangs, gross weight and usually axle weights it covers. Read these as a ceiling, not a measurement. The permit covers your load up to those figures and not an inch or pound more.

So measure the loaded rig, not the spec sheet. Include tarps, chains and anything that sticks out. If the load measures taller at a check than the permit says, the permit does not stretch to fit.

Those numbers drive the rest of the permit. Escorts, hours and holiday rules are triggered by width, height and length. A few inches can mean stricter conditions.

The route and what "approved route" means

The permit names a route. It may be a list of highways and turns, or a written description from origin to destination. That route is the approved route. The state checked that route for your dimensions and weight, including bridges and clearances.

Stay on it. A detour you pick yourself is a route the state never reviewed. If a closure forces a change, call the issuing office first. Some state permits cover state highways only, so local roads and toll roads may need their own permission. Pennsylvania, for example, notes that the PA Turnpike has its own rules.

Validity dates: single trip or annual

Look for the effective date and the expiration date. A single-trip permit covers one move of one load over one route within that window. An annual or period permit covers repeated moves within set dimensions for a longer time, usually on a defined road network.

Starting early or finishing late can put the move outside the permit. If weather or a breakdown holds you up, ask the issuing office what to do before the permit runs out.

Travel hours and days

Many states limit oversize moves to daylight and add weekend, rush hour and holiday restrictions. The permit may print them or refer to the state's rules. Either way, they apply.

Here is how three states handle hours, weekends and holidays, taken from their official rules:

  • Pennsylvania. Hours: no movement from sunset to sunrise. Weekends: no movement Saturday after 12 noon or any time Sunday. Holidays: from the 2026 schedule, the Thanksgiving restriction runs from 12 noon Nov 25 to sunrise Nov 30.
  • Florida. Hours: daytime only for loads over 10 ft wide, over 14 ft 6 in high or over 80 ft long; loads up to 10 ft wide and up to 80 ft long may move all days and hours. Weekends: prohibited unless otherwise noted on the permit. Holidays: for loads over 10 ft wide, over 14 ft 6 in high or over 80 ft long, no movement all day on the listed holidays, including the day after Thanksgiving.
  • Minnesota. Hours: generally no restriction unless noted on the permit; in the Twin Cities and Duluth metro areas, no travel weekdays 6:00 to 8:30 a.m. and 3:30 to 6:00 p.m. for loads over 14 ft 6 in wide or 110 ft long. Weekends: no general ban stated. Holidays: for loads over 12 ft 6 in wide or 110 ft long, no travel from 2:00 p.m. the day before the holiday to 2:00 a.m. the day after.

Notice the wording. Under Florida's rule, weekend and holiday movement is prohibited unless the permit says otherwise. Minnesota's general hours apply unless the permit notes a restriction. The permit itself can tighten or loosen the general rule, so read it line by line.

Holidays need extra care. Florida also observes a Saturday holiday on the preceding Friday and a Sunday holiday on the following Monday. Minnesota's restriction does not apply to overweight-only loads. The federal holiday dates themselves come from the Office of Personnel Management. Memorial Day is the last Monday of May, Labor Day is the first Monday of September and Thanksgiving is the fourth Thursday of November. Each state decides which holidays count and how long its curfew runs.

Some conditions are not about the clock. Florida bars travel when visibility is under 1,000 ft, and nighttime moves there need FDOT approval and law enforcement escorts.

Escorts and signs

The permit, or the state rules it refers to, tells you when you need escort vehicles, how many and where they go. Escort triggers are usually set by width, height and length.

In Pennsylvania, a load over 13 ft wide needs one pilot car. It rides at the rear on multilane roads and in front on single-lane roads. A load over 14 ft 6 in high needs a front pilot with a height pole. A load over 90 ft long, or with a 15 ft rear overhang, needs a following pilot.

In Florida, a load over 12 ft and up to 14 ft wide needs one qualified escort. It follows on four-lane divided highways and leads on two-lane highways. Over 14 ft wide needs two. Over 14 ft 6 in high needs a lead escort with a height pole. Over 95 ft long needs one escort.

The permit may also require "Oversize Load" signs, flags and warning lights. If it asks for more than the general rule, follow the permit.

Special conditions

Many permits carry special conditions for your load and route. Typical items include:

  • Bridges. Instructions to cross certain structures at reduced speed, in the center of the bridge, or with no other heavy vehicle on the span.
  • Construction. Work zones on the route, lane width limits or a note to check closures before you go.
  • Weather. Limits on travel in poor visibility, high wind, ice or snow.
  • Speed. A maximum speed lower than the posted limit for all or part of the trip.

Treat every line here as binding.

What to keep in the cab

Keep the permit with the load for the whole trip, in the form the state accepts, ready to show at a scale or roadside stop. Carry any amendment with the original, plus contact details for the issuing office and your escorts.

When something goes wrong

Running over the permitted dimensions, off the approved route, outside the travel window or without required escorts can mean the permit no longer covers the move. Depending on the state, that can lead to fines and to the load being held until it is legal or properly permitted. Penalties vary by state.

How states differ

Start with the difference between legal limits and permit limits. Federal rules in 23 CFR 658 set the baseline on the Interstate system. Under that part, states may not set a width limit of more or less than 102 inches on the National Network, and the gross weight limit on the Interstate is 80,000 pounds. Loads above legal limits need a state permit. Each state then sets its own permit limits, escort triggers, hours and holiday rules.

Who issues the permit also varies. In Pennsylvania it is the PennDOT Central Permit Office. In Florida it is the FDOT State Maintenance Office. In Minnesota it is MnDOT's Office of Freight and Commercial Vehicle Operations. A multi-state move needs a permit from each state, and each permit has its own conditions.

Check rules with the state agency and the state's own regulations. The permit issued for your load is the final word for that move.

Check before you roll

Look up each state on the route before you plan. Our state oversize permit pages list legal limits, escort triggers, travel hours and holiday rules, each with links to the official sources. For example, see Pennsylvania, Florida and Minnesota. Use the holiday restrictions page to see which holidays block oversize travel and when. To see two states side by side, use the state comparison tool.

Related guides

Each condition on a permit has its own guide:

Sources