Who handles oversize permits and escorts on a heavy haul move

Why oversize moves need permits at all

Federal rules set the baseline for trucks on the national network: 102 inches wide Source and 80,000 lb gross unless the bridge formula says less. Source There is no federal height limit; each state sets its own. Source A load that goes past any of those limits, or a state's own length and height limits, needs a permit from every state it crosses.

Permits don't just give permission. They set conditions: the exact route, travel hours and days, signs, flags and lights, the number and position of escort vehicles, and sometimes speed limits or bridge crossing instructions. The permit is the rulebook for that one move, and the driver carries it.

Who does what on a three-state move

The card below lays out an example move: an excavator from Texas through Oklahoma to Kansas. Switch between the two most common arrangements, carrier arranges and broker arranges, to see how the work shifts. In both, the driver still drives the permitted route and carries every permit.

Each state on that route has its own permit office. Texas issues oversize and overweight permits through the Texas Department of Motor Vehicles. Source Kansas issues them through K-TRIPS, its online system, and generally keeps loads over legal length or width off the road at night. Source Oklahoma's size and weight permit office has been moving from the Department of Public Safety to the state DOT, so confirm the current office before you apply.

Permit services

Many heavy haulers don't order permits themselves. A permit service holds accounts with the state offices, knows each state's system, plans routes that will actually be approved and orders all the permits for a move, usually for a fee per permit. For a carrier running a few oversize loads a month, that is often cheaper than learning every state's system.

The carrier still owns the result. If the permit has the wrong dimensions or the wrong route, the driver is the one stopped at the scale. Check every permit against the load before you roll.

Escorts and pilot cars

Escort requirements come from the permit. They depend on the load's width, length, height and sometimes weight, and on the road type, so the same load can need no escort in one state, one escort in the next and front and rear escorts in a third. Some states require escort drivers to be certified, and some cities require police escorts for large moves through town.

Pilot car companies supply the vehicles and drivers, with height poles for tall loads, signs and lights. Book them early for busy seasons and long moves, and confirm where they will meet the truck and where each one drops off at a state line.

Escort rules by state

Each state publishes its own escort thresholds and requirements on its permit pages, and they change. Check the official page for every state on the route, or use a permit service that does. Our oversize load checker flags when a load goes past the federal width and weight lines, which is the first sign that permits and possibly escorts are needed.

Route surveys and superloads

Very large or heavy loads, often called superloads, may need a route survey before the permit is issued: someone drives the route and measures clearances, turns and obstacles, and the state may run bridge analysis on the heaviest moves. Utility crews may have to lift wires. That work takes time and money, and it is planned and priced before the move is accepted.

How the costs pass through

On a typical heavy haul quote, the linehaul pays the carrier for the move itself. Permits, escorts and surveys are listed as separate lines, either paid by the carrier and billed back as pass-through costs, or paid directly by the broker or shipper. Keep every receipt and match it to the rate confirmation, because pass-through costs that aren't written on the rate con are hard to collect later.

Escort and permit costs can change after booking, for example when a state reroutes the load or adds an escort. Agree in advance how changes are handled, so a surprise escort doesn't come out of your linehaul.

Single-trip and annual permits

Most oversize moves run on single-trip permits: one load, one route, a set number of days. Carriers who move similar loads often within one state can sometimes buy annual or blanket permits that cover repeated moves up to certain dimensions, which saves ordering a new permit every time. The limits and rules for those permits are set by each state.

An annual permit doesn't cover everything. Loads above its dimensions or weights still need a single-trip permit, and routes may still be restricted. Check what your annual permit allows before you assume a load is covered.

Overweight is its own question

A load can be overweight without being oversize. Overweight permits look at axle loads and bridges on the route, and very heavy moves may need more axles, a different trailer or a longer route that avoids weak bridges. Check every axle group, not just the gross.

Travel windows: nights, weekends and holidays

Most permits limit when an oversize load can move. Daylight-only travel is common for wide and long loads, and many states restrict weekend and holiday travel, sometimes extending holiday restrictions to the days around them. Some cities add rush-hour bans on their own roads.

Those windows decide the schedule as much as the miles do. A three-day move that starts on a Thursday can easily stretch to five if a weekend restriction lands in the middle. We plan the start day around the windows of every state on the route, so the delivery date you agree to is one you can keep.

Signs, flags and lights

Permits also specify how the load is marked: oversize load banners front and rear, red or orange flags at the widest and longest points, and warning lights, often amber, on the truck and sometimes on the load. Requirements differ by state and by the size of the load, and inspectors check them.

Keep a full kit on the truck and check it against each permit before you leave. A missing flag is a small thing to fix in the yard and an expensive one at a weigh station.

When the load changes

Loads change after permits are ordered more often than anyone would like. The shipper adds an attachment, the machine turns out taller than listed, or the pickup slips by a week and the permit dates expire. Any change in dimensions, weight, route or dates usually means a permit amendment or a new permit.

Measure the load at pickup before you sign for it. If it doesn't match the permit, stop and call. Driving a load that doesn't match its permit is driving without one.

Before you accept an oversize load

1. Get the length, width, height and weight in writing, with attachments, from the shipper.
2. Confirm your trailer can carry it inside legal or permittable limits.
3. List every state on the route and check each one's permit and escort requirements.
4. Agree who orders permits and escorts, and how they are billed, on the rate confirmation.
5. Check travel windows against the pickup and delivery dates.
6. Confirm the loading method and that the pickup site can load the piece.
7. Price the move on all the miles, including a permitted route that may be longer than the map says.

Permit mistakes that cost heavy haulers

• Trusting brochure dimensions. Measure the real machine, attachments and all.
• Forgetting one state. A permit for two of three states is not a legal move.
• Leaving the permitted route. Detours, even for fuel, can void the permit in some states.
• Letting permits expire. Delays at pickup can push a move past its permit dates.
• Agreeing costs verbally. If permits and escorts aren't on the rate con, collecting them later is a fight.

What our desk does

Before an oversize load reaches you, we confirm the dimensions and weight in writing, the trailer that keeps it legal or permittable, the route, the states it crosses and who orders and pays for permits and escorts. We coordinate with your permit service or the broker's, and we plan the travel days around the permit windows. Then we call you with all of it, and you decide.

New to heavy haul? Our guide on how to get into heavy haul trucking covers the trailer, the insurance and the experience shippers look for.