Do You Need an Oversize Load Permit?
If your truck or load is bigger or heavier than the law allows on a given road, you generally need a permit before you move it. The tricky part is that the limits are not the same everywhere. Each state sets its own rules, and cities, counties, and toll authorities can add more.
The four things that trigger a permit
Permits are usually tied to one or more of these measurements going past the legal limit:
- Width: a load wider than the standard legal width.
- Height: a load taller than the standard legal height, which matters most under bridges and utility lines.
- Length: a vehicle or load longer than the legal length for that road type.
- Weight: total weight, or weight on an axle or axle group, above the legal limit.
What is a superload?
A load that cannot be taken apart and goes well past the normal permit limits is often treated as a superload. These typically get extra review, a specific route, and sometimes extra escorts.
Before you roll
- Measure the loaded vehicle at its widest, tallest, longest, and heaviest points.
- List every state you will pass through. You need to meet each state’s rules.
- Check travel-time limits, holiday restrictions, and whether escorts, signs, flags, or lights are required.
- Read the permit and its provisions sheet carefully. They control what you are actually allowed to do.
This article is general information only. Rules change, so always confirm current requirements with the state transportation agency before you move a load.
Need a permit? Start here.