When you need oversize load permits, how to get them, state-by-state requirements for the Southeast, pilot car rules, travel time restrictions, route planning, and costs.
return ( When Do You Need an Oversize Permit? Federal and state regulations set maximum dimensions for vehicles on public highways.
When your load exceeds any of these dimensions, you need an oversize/overweight (OS/OW) permit from every state you will travel through.
The standard legal limits are: Width: 8 feet, 6 inches (102 inches).
Anything wider requires a permit.
Height: 13 feet, 6 inches in most states.
Some states allow 13 feet 6 inches on interstates but have lower limits on state roads.
Length: 48 feet for a semi-trailer on the National Network.
Overhang beyond the trailer rear varies by state — typically 3-4 feet before requiring markings, permits needed for significantly longer loads.
Weight: 80,000 lbs gross vehicle weight, with axle limits of 12,000 lbs (steer), 20,000 lbs (single axle), and 34,000 lbs (tandem axle).
Even exceeding these limits by one inch or one pound requires a permit.
Running oversize or overweight without a permit is a serious violation that carries heavy fines — typically $500 to $10,000+ depending on the state and severity — plus potential CSA points and out-of-service orders.
Types of Oversize Permits Single-Trip Permits Issued for one specific trip between a defined origin and destination.
The permit specifies the exact route, travel dates (usually valid 5-10 days), and conditions.
This is what you need for occasional oversize loads.
Costs range from $15 to $200+ per state depending on dimensions and weight.
Annual and Blanket Permits If you haul oversize loads regularly, annual permits allow unlimited trips within a state for one year, subject to dimension limits specified on the permit.
Annual permits typically cover loads up to a certain width (usually 12 feet) and are more cost-effective if you do more than a few oversize loads per year.
Costs range from $50 to $500+ per state per year .
Overweight Permits Separate from oversize dimension permits.
Overweight permits specify maximum gross weight and axle weights above the standard limits.
They often come with route restrictions and may require engineering analysis of bridges on the route.
Overweight permits are more expensive and harder to obtain than dimension permits.
Southeast State Permit Offices Each state has its own permitting process, application, and fee schedule.
Here are the key contacts for Southeast states: Alabama Agency: Alabama Department of Transportation (ALDOT) Portal: Alabama permits available through ALDOT's online permitting system or third-party permit services Width limits: Up to 14 feet wide allowed with single-trip permit.
Over 14 feet requires special approval.
Annual permits available: Yes, for loads up to 12 feet wide Phone: (334) 242-6356 Georgia Agency: Georgia Department of Transportation (GDOT), Permits Office Portal: GDOT Oversize/Overweight Permit System (online) Width limits: Single-trip permits available for loads up to 16 feet wide Annual permits available: Yes, for loads up to 12 feet wide, 14 feet high, 95 feet over.
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