What is an Oversize Permit?

An Oversize Permit is an official document issued by state transportation departments that allows you to transport loads that exceed legal limits for weight, width, length, or height. These permits:

• Authorize legal operation of wideloads

• Specify travel times, routes, and safety requirements

• Help ensure the safe and legal transport of large cargo

Do You Need an Oversize Permit for Your Load?

If your load exceeds any of the following limits, you will need an oversize permit:

Typical Dimension Limit
Width 8 feet 6 inches
Height 13 feet 6 inches
Length 48–53 feet (varies)
Weight 80,000 pounds gross

Even small excesses require a permit—there’s no wiggle room in most states.

Step 1: Measure Your Load Accurately

Use precise tools to measure:

• Total width, including side extensions

• Overall height, from ground to top of the load

• Total length, including trailer

• Axle weight and total weight

Consider investing in a laser measuring tool or load measuring software.

Step 2: Determine State or Multi-State Requirements

Each U.S. state has its own oversize permit rules. Some important notes:

• If you're crossing state lines, you may need multiple permits

• Visit each state’s DOT website for current regulations

• Some states require additional pilot cars, escort permits, or city-specific clearances

Step 3: Choose the Type of Permit You Need

There are different kinds of oversize permits:

Single Trip One-time deliveries, point A to B
Annual Permit Recurring routes or loads
Superload Permit Extremely large/heavy hauls
Blanket Permit Multiple loads in a state for a year

Always choose the most cost-effective option for your operation.

Step 4: Prepare Required Documentation

Before applying, make sure you have:

• Vehicle details (VIN, license plate, make/model)

• Load description (type, dimensions)

• Route details (origin, destination, waypoints)

• Insurance proof (showing adequate cargo coverage)

Some states may also ask for bridge clearance documentation.

Step 5: Define a permit fee

Permit fees highly depend on states, load size and route.

Step 6: Wait for Approval and Review Permit Details

Permits are usually approved within:

• 1–72 hours for standard permits

• Up to 5 days for superloads

Once approved:

• Double-check your approved route

• Note the travel windows

• Understand your escort vehicle requirements

Step 7: Attach Required Signage and Lights

Once permitted, you must comply with safety signage laws:

• “OVERSIZE LOAD” or “WIDE LOAD” banners (front and rear)

• Red flags on corners

• Amber flashing lights for visibility

Some states also require reflective tape or rear escort warning signs.

Step 8: Follow Travel Restrictions on Your Permit

Key restrictions include:

• Daylight hours only

• No travel during rush hours

• Weather-based limitations (e.g., high winds, snow)

• Weekend or holiday bans in certain states

Violating any of these can void your permit.

Step 9: Maintain Permit Documentation During Transit

Always carry:

• Physical or digital copies of your permit

• Route approval documents

• Escort car certifications (if needed)

DOT officers can request these documents during inspections.

Step 10: Keep Records for Compliance and Renewals

Create a digital or physical copy to store:

• Past permits

• Escort vehicle logs

• Incident reports

• Maintenance records for oversize trailers

Good recordkeeping ensures easier process and helps in audits or claims.

What Happens If You Skip the Permit Process?

• Fines between $1,000–$10,000

• Possible vehicle impoundment

• Loss of insurance coverage

• DOT violations on your company record

Permits are cheaper than penalties. It’s not worth the risk.