How to Get an Oversize Load Permit: Step-by-Step Guide for Equipment Shippers

When Do You Need an Oversize Load Permit?

Federal regulations require permits when a load exceeds any of the following thresholds:

• Weight: Gross vehicle weight (GVW) over 80,000 lbs
• Width: Over 8.5 feet (102 inches)
• Height: Over 13.5 feet from road surface
• Length: Over 53 feet (varies by state)

Most heavy construction equipment — excavators, bulldozers, cranes, wheel loaders, motor graders — exceeds at least one of these thresholds. Even equipment that appears "small" (like a compact excavator on a lowboy trailer) often exceeds height or weight limits when loaded.

Step 1: Gather Accurate Load Specifications

The permit application requires precise measurements of the loaded vehicle — not just the equipment alone. You need:

• Overall length: From the front of the tractor to the rear of the trailer, including any overhang
• Overall width: At the widest point of the load (including any attachments, buckets, or blades)
• Overall height: From road surface to the highest point of the load
• Gross vehicle weight: Total weight of tractor + trailer + equipment
• Axle weights and spacing: Weight on each axle and distance between axles (for bridge formula compliance)

Inaccurate measurements are the most common cause of permit violations and fines. If you are unsure of your equipment's weight, use a certified scale. If you are unsure of dimensions, measure physically — do not rely solely on manufacturer specs, which may not account for attachments or modifications.

Step 2: Plan Your Route

Permits are route-specific. Before applying, plan the complete route from origin to destination, considering:

• Bridge clearances: Identify any low bridges on the route. The Federal Highway Administration's bridge database and state DOT resources can help identify clearance restrictions.
• Road weight limits: Some roads have posted weight limits lower than federal standards. Avoid these roads or obtain special permits.
• Construction zones: Active construction can reduce lane widths and create temporary height restrictions.
• Urban routing: Major metro areas often have specific oversize routing requirements that avoid certain expressways during peak hours.

For complex routes or superloads, consider hiring a professional route survey company to physically inspect the route and identify potential hazards.

Step 3: Identify All Jurisdictions

A single trip may require permits from multiple states, counties, and municipalities. For a cross-country move, you may need permits from 4–6 states. Each state has its own:

• Permit application portal or process
• Fee schedule
• Processing time (typically 1–5 business days for standard loads)
• Travel restrictions (time of day, day of week, holidays)
• Escort/pilot car requirements

States with online permitting portals (Texas TxPROS, Ohio OHGO, California Caltrans) are generally faster. Some states still require fax or email applications, which can take longer.

Step 4: Submit Permit Applications

Submit applications to each state simultaneously to minimize total processing time. Required information typically includes:

• Carrier name, USDOT number, and contact information
• Vehicle make, model, year, and license plate
• Trailer type and configuration
• Load dimensions (length, width, height)
• Gross vehicle weight and axle weights/spacing
• Origin and destination addresses
• Planned route (specific highways and roads)
• Requested travel dates

Step 5: Meet Permit Conditions Before Travel

Once permits are issued, review all conditions carefully before dispatching the load. Common conditions include:

• Travel hours: Many states restrict oversize travel to daylight hours (typically 30 minutes before sunrise to 30 minutes after sunset). Some states prohibit oversize travel on Sundays, holidays, or during adverse weather.
• Escort/pilot car requirements: Loads over 12–14 ft wide typically require one or more pilot cars. Some states require law enforcement escorts for superloads.
• Signage and lighting: Oversize loads must display "OVERSIZE LOAD" banners on the front and rear, amber warning lights, and red flags on the widest points.
• Route compliance: The driver must follow the permitted route exactly. Deviating from the permitted route — even to avoid traffic — can result in fines and the permit being voided.

Using a Permit Service vs. DIY

Many equipment shippers use professional permit services or carriers (like IronHaul) that handle permit acquisition as part of the transport service. This is particularly valuable for multi-state moves, superloads, or time-sensitive shipments where permit errors can cause costly delays. DIY permitting is feasible for simple single-state moves but becomes complex quickly for multi-state routes.

IronHaul Logistics handles all permit coordination as part of our heavy equipment transport service. You provide the equipment specs and route — we handle the rest. Call (208) 495-2260, email [email protected], or submit a quote request online.