Washington Oversize / Overweight Trucking Permits Rules and Requirement
Washington Oversize permits OR Washington Overweight Permits are required when a vehicle or its load exceeds the state feet legal size or weight limits and needs to travel on public highways. These permits ensure compliance with safety standards and protect road infrastructure.
Washington oversize permits phone number: 270-908-9656
Compare Transport LLC is your trusted source for Washington Oversize Permits, Washington Overweight Permits, and Washington Overhang Permits. Whether you need a Washington Trip Permit, 3-day Trip Permit Washington State, 30-day Trip Permit Washington State, or even a 60-day Trip Permit Washington State, we make the process simple and affordable. Order your Washington State Oversize Permits Online with expert WSDOT permit, WSDOT commercial vehicle permits, and Washington DOT Permits. We also assist with Washington Single Trip Permits, Washington Annual Permits, and ensure compliance with Washington State Wide Load Regulations.
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Washington oversize regulations
Washington Legal Dimension Limit
Legal Dimensions for Trucking in Washington
- Length:
Standard semi-trailer length: 53 feet
Legal transport limits can be extended to 56 feet for trailer and load length - Overhang Limits:
Front: Up to 3 feet
Rear: Up to 15 feet, measured from the center of the rearmost axle to the end of the load - Maximum Width: Up to 8 feet 6 inches allowed
- Maximum Height: Maximum legal height is 14 feet
Washington Legal Weight Limit
The allowable gross weight is 80,000 pounds, subject to axle configurations:
Axle weight limits Washington
- Steer axle: Up to 600 pounds per inch of tire width (e.g., 13,200 lbs. with 11-inch tires)
- Single axle: Up to 20,000 pounds
- Tandem axle: Up to 34,000 pounds
- Tridem axle: Up to 42,000 pounds, provided the spacing between axles is at least 8 feet
Divisible Loads Over 80,000 lbs:
When operating on Washington’s state and interstate routes, a permit is unnecessary for loads over 80,000 lbs, provided axle and group weight limits aren’t exceeded and the vehicle registration reflects at least the total gross weight.
Washington Routine Limit: Washington Oversize and Overweight Limits
- Length: Maximum length for trailer and load: 125 feet.
- Width: Maximum permitted width: 16 feet (limited to 14 feet on two-lane roads)
- Height: Maximum height under routine permit: 16 feet
Note: Washington’s permits do not guarantee clearance for height along designated routes. Operators are responsible for verifying vertical clearances.
Maximum Weights With Washington Overweight Permit:
Weight (based on axle configuration and spacing)
- Axle Weight Limits:
Steer axle: 600 pounds per inch of tire width (maximum 13,200 pounds using 11″ tires)
Single axle: 22,000 pounds
Tandem axle: 43,000 pounds
Tridem axle: Weight depends on spacing
Example: 54,080 pounds with 4’2″ spacing; 58,500 pounds with 4’6″ spacing
- Gross Vehicle Weights (based on axle count and spacing):
5 axles: Up to 99,000 pounds
6 axles: Up to 114,700 pounds
7 axles: Up to 130,000 pounds
Vehicles can register for weights up to 105,500 pounds or more depending on permitting needs.
Superload Classification: Any load exceeding the above routine dimensions or surpassing 200,000 pounds in gross weight is classified as a Super Load and requires special review
Washington oversize permits validity period
To operate legally in Washington, commercial carriers must secure the appropriate permits based on vehicle size, weight, and registration status. Below is a detailed guide to the validity of all key Washington trucking permits, including oversize, overweight, superload, IRP, IFTA, TRP, and temporary trip and fuel permits.
Operating Time Washington:
Movement is allowed from 30 minutes before sunrise to 30 minutes after sunset, including Saturdays and Sundays. Additionally, vehicles or loads that do not exceed 12 feet in width, 14 feet 6 inches in height, or 105 feet in overall length (including legal overhangs) may operate at night if equipped with proper lighting as defined under Federal Regulation 49 CFR 393.11.
Restricted Travel Washington:
Curfews based on time and width apply from Monday through Friday in metropolitan zones such as Seattle-Everett, Tacoma, Olympia, Vancouver, and Kelso. These curfews are listed on the travel restriction sheet provided with permits. A verification number is required to travel on city streets in Seattle and Tacoma.
Holiday Travel Restrictions
Unless specifically stated on the Washington oversize permit, no movement is allowed on the following holidays: New Year’s Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, and Christmas Day, including the holiday weekends starting the preceding Friday.
Seasonal Weight Load Restrictions
Seasonal weight laws such as the Frost Law apply in Washington and many other states and Canadian provinces. Oversize load permits may include special provisions based on seasonal changes, the nature of the cargo, or the type of equipment used.
Restricted Areas for Certain Vehicles:
Permitted vehicles are not allowed to travel in areas marked with signs like:
- “Traction Advisory / Oversize Vehicles Prohibited”
- “Chains Required on All Vehicles Except All-Wheel Drive”
- “Vehicles Over 10,000 GVWR Prohibited”
Exceptions may apply as outlined in WAC 468-38-075.
Road and Bridge Restrictions
Washington follows the Federal Bridge Formula, which enforces specific bridge weight limitations. Road restrictions may include, but are not limited to:
- Passing through construction or work zones
- Ignoring warning signs in those areas
- Failing to yield to law enforcement or emergency vehicles
Note: All vehicles, whether self-propelled or towed, must adhere to posted bridge weight limits.
Escort requirement
On Multi-Lane Highways:
- Length: Trailer and load combinations exceeding 125 feet require 1 escort vehicle
- Overhang: If rear overhang exceeds one-third of the total trailer and load length required 1 escort
- Width:
Over 14 feet required 1 escort
Over 16 feet required subject to individual case evaluation - Height: Over 14 feet 6 inches required 1 escort required
On Two-Lane Highways:
- Length: Loads measuring more than 105 feet must be accompanied by 1 escort
- Overhang: When rear overhang surpasses one-third of the trailer and load’s total length, 1 escort is mandatory
- Width:
Over 11 feet required 2 escort vehicles
Over 16 feet, evaluated case by case - Height: Over 14 feet 6 inches, 1 escort required
Washington Banners, Lighting & Flage Requirement
An “Oversize Load” sign must be displayed at the front of the tractor at a height of 5 feet from the ground, or as high as possible if 5 feet is not achievable. A similar sign must be displayed on the rear of the vehicle or load, also mounted as close to 5 feet above ground level as is practical (or between 5 to 7 feet if applicable).
These signs are not required for overweight-only loads.
Red flags are mandatory at all four corners of overwidth loads and on the outermost ends of any projections or overhangs.
When night travel is authorized, any load that extends beyond the vehicle’s width must be marked with amber lights visible from the front and sides, and the rearmost edge of the projecting load must have a red light visible from the rear and sides.
Additional Regulations:
All lift axles must stay engaged if axle loads exceed statutory limits. Monthly/Annual Permit (Single Trailer): $10 (30 days) or $100/year: Covers semi-trailers up to 56 feet hauling divisible cargo. Whenever feasible, overweight single-piece loads must be reduced. Any load that is welded, bolted, or otherwise secured together is considered reducible unless proven otherwise.
Washington Oversize/Overweight Fee structure
Washington offers a variety of vehicle and transportation permits, each with its own fee depending on the type and usage. Below is a breakdown of key permit types and their current associated costs:
Washington Oversize Permit Agency
Washington Oversize Permits for Truck with Permit Cost
Washington Heavy Hauling Company for Heavy Equipment Shipping
Compare Transport LLC is your go-to choice for the best heavy-haul oversize trucking services across the United States and Canada. As a leading heavy-haul transportation company, we specialize in handling over-dimensional and overweight shipments with precision and expertise.
Our team of experienced heavy haul movers ensures the safe and efficient transportation of your cargo, no matter how challenging the dimensions or weight may be. We pride ourselves on providing top-notch heavy haul trucking services, utilizing state-of-the-art equipment and industry-leading techniques.
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Compare Transport LLC is the single STOP for all Oversize / Overweight permits with one easy-to-use application.
Frequently Asked Questions
Washington oversize permits can be obtained online through our website comparetransportll.com or by calling us at 270-908-9656
In Washington, the maximum legal width for commercial vehicles without a permit is 8 feet 6 inches on designated roads. Any load exceeding this width requires an oversize permit.
Permit regulations in Washington require that any load exceeding legal size or weight limits such as width, height, length, or weight must have the proper permit before movement.
Yes, Washington requires trip permits for vehicles not registered under the IRP (International Registration Plan).
A Washington overweight permit typically starts at $20, with an additional $0.30 per mile for loads that exceed legal weight limits.
Washington oversize permits can be obtained online through our website comparetransportll.com or by calling us at 270-908-9656
The base fee is $20, plus $0.30 per mile over the legal gross weight. Bridge or structure crossings may incur additional fees.
Oversize permits generally cost $20 per single trip. Costs may vary based on load size, type, and route.
Washington law requires a permit for loads that exceed 8’6″ in width, 13’6″ in height, 53 feet in trailer length, or 80,000 lbs gross weight. All oversize moves must comply with specified hours and routing.
Applications for Washington oversize permits can be submitted online via our website comparetransportll.com or by calling us at 270-908-9656
Generally, oversize loads are restricted to travel between sunrise and sunset, Monday through Friday. Night travel is typically not allowed unless specifically permitted.
Truck laws cover legal dimensions, axle spacing, weight limits, safety equipment, and permitted travel times.
Washington allows a maximum Gross Vehicle Weight Rating (GVWR) of 80,000 pounds on most designated routes without a permit. Loads exceeding this require an overweight permit.
The phone number for assistance is 270-908-9656.
You can obtain a Washington trip permit online Compare Transport LLC, which simplifies the process and ensures compliance.
Yes, you can get Washington oversize permit online by calling us at 270-908-9656.
A Washington weight permit authorizes movement for vehicles or loads that exceed legal weight limits.
Any load exceeding 8’6″ wide, 13’6″ high, 53 feet long (on designated roads), or 80,000 lbs gross weight is considered oversized.
To get your Washington oversize permits fast and at competitive prices, contact Compare Transport LLC at 270-908-9656. Their experienced team will handle all permit types across the U.S. and Canada.
The standard weight limit is 80,000 lbs gross on designated highways, with axle-specific limits. Heavier loads require permits.
For managing Washington oversize permits, you can use the VA Hauling Permits system login.
A single-trip Washington oversize permit is $20, with additional mileage or structural fees depending on the load. For annual or blanket permits, the fees vary.
