Oregon Over-Dimension Permit Requirements

Nov. 21, 2025, 5:28 p.m.
Operating oversize or over-dimension commercial vehicles in Oregon requires compliance with specific rules established by the Oregon Department of Transportation (ODOT). These permits ensure that large loads move safely across highways without damaging infrastructure or creating hazards. Below is a complete, easy-to-understand guide to Oregon’s over-dimension permit requirements.
Oregon Over-Dimension Permit

What Is an Over-Dimension Permit in Oregon?

An Over-Dimension (OD) Permit is required when a commercial vehicle exceeds Oregon’s standard legal size limits:

  • Width: Over 8 ft 6 in (102 inches)

  • Height: Over 14 ft

  • Length: Depends on configuration (typically over 40–65 ft)

  • Overhang: More than 4 ft front or rear

Any load that exceeds these limits must obtain an appropriate ODOT oversize permit before operating on public roads.

Key Oregon Over-Dimension Permit Types

1. Single-Trip Over-Dimension Permit

Allows one-time movement from Point A to Point B.

Best for:

  • Construction machinery

  • Prefabricated structures

  • Specialized equipment

2. Annual Over-Dimension Permit

Allows repeated movements for qualifying loads over 12 months.

Common uses:

  • Logging operations

  • Utility companies

  • Heavy equipment fleets

3. Continuous Operation Permits

Available for certain equipment types (e.g., mobile cranes, well-drilling machinery) that frequently travel on Oregon highways.

Legal Dimension Limits Without a Permit

Width

  • Max: 8 ft 6 in

  • Mirrors and some safety devices may exceed by small allowances.

Height

  • Max: 14 ft

  • Loads over 14 ft typically require route restrictions due to bridges and power lines.

Length

Varies by vehicle type:

  • Straight truck: 40 ft

  • Truck + trailer: 65 ft

  • Semitrailer: 53 ft (some exceptions)

Longer combinations require a permit.

Pilot Car & Escort Requirements

Oversize loads may require escorts, depending on width, height, or route.

Typical thresholds:

  • Width over 12 ft: Usually 1 or 2 escorts

  • Height over 14 ft 6 in: May require a route survey and pilot car

  • Extreme lengths: More escorts may be needed

Escort vehicle certifications are mandatory in Oregon.

Travel Time Restrictions

Depending on size, certain restrictions apply:

  • Loads over 12 ft wide: Often limited to daylight hours

  • Holiday travel: Restricted for large loads

  • Inclement weather: Travel may be suspended based on wind or visibility

ODOT road conditions are updated frequently to manage oversize travel safely.

Required Information for an OD Permit

To apply, carriers typically must provide:

  • Vehicle configuration

  • Overall dimensions (height, width, length, weight)

  • Axle spacing and axle weights (if overweight)

  • Load description (divisible or non-divisible)

  • Requested route

  • Insurance and USDOT information

How to Apply for an Over-Dimension Permit

Carriers can obtain Oregon permits through:

1. www.oregontruckingonline.org

Allows registration, permit ordering, and WMT reporting.

2. ODOT Commerce & Compliance Division (CCD)

Permits may also be requested via:

  • Telephone (503) 386-4187

Special Route Restrictions

  • Many highways have height restrictions due to low bridges.

  • Mountain passes may be restricted in winter.

  • Certain roads prohibit loads over specific lengths or widths.

Route maps must be reviewed carefully to avoid violations.

Penalties for Operating Without a Permit

Penalties may include:

  • Heavy fines

  • Immediate vehicle shutdown

  • Required re-routing or off-loading

  • Suspension of Oregon account privileges

Compliance is essential to keep freight moving legally.

Summary

An Oregon Over-Dimension Permit is required anytime a commercial vehicle exceeds standard legal size limits. Understanding width, height, length, routing, escort, and travel-time rules ensures safe and compliant transport across the state. ODOT’s permitting system provides several options—single-trip, annual, and continuous—to support all types of oversize operations.