Overweight Trucking Permits Rules and Requirement
Idaho Oversize permits OR Idaho 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.
Idaho oversize permits phone number: 630-222-5770
Compare Transport LLC is your trusted oversize permit agency and freight broker, offering reliable services for obtaining all types of Idaho DOT permits, including Idaho oversize permits, Idaho overweight permits, and temporary permits. Whether you’re hauling a wide, tall, or long load, we ensure full compliance with Idaho oversize restrictions and Idaho oversize regulations.
We specialize in securing Idaho oversize load permits, Idaho overlength permits, Idaho wide load permits, and more, so you can transport legally and safely across the state. Our expert team helps you understand and comply with Idaho oversize provisions, including requirements for Idaho kingpin permit cost, escort vehicles, and curfew zones.
Need access to your permit quickly? We provide hassle-free support for Idaho oversize permit login and Idaho oversize permits online systems. Whether you need Idaho single trip permits, Idaho annual permits, or Idaho overweight permit application support, we’ve got you covered. Our services extend to Idaho temporary IFTA permits and Idaho temporary fuel permits to ensure full compliance with all Idaho trucking laws.
Idaho oversize regulations
Idaho Legal Dimension Limit
Legal Dimensions for Trucking in Idaho:
- Legal Length in Idaho:
A 53 feet semi-trailer is permitted on the National Network.
When using non-designated routes that are outside of the National Network, the maximum trailer length allowed is 48 feet.
Note: Several two-lane highways in Idaho are classified as non-designated. This includes highways such as US-12 (excluding the segment from Lewiston to Spalding), US-93 (between Salmon and Challis), and US-95 (stretching from Council to Grangeville). - Divisible Load Length: For divisible loads, trailers longer than 48 feet are only authorized with an Annual Extra Length Permit. In such cases, the off-tracking of the tractor-trailer combination must stay within 5.50 feet (some mountainous roads require it to be within 3.00 feet).
- Non-Divisible Load Length: Non-divisible loads can be permitted through a single-trip or annual permit regardless of off-track measurements.
- Overhang Limits:
Rear: Maximum 15 feet
Front: Maximum 4 feet - Width: The maximum allowable width is 8 feet 6 inches.
- Height: The permitted height is up to 14 feet.
Idaho Legal Weight Limit
The maximum allowable gross vehicle weight is 80,000 pounds, subject to axle configurations:
Axle weight limits Idaho:
- Steering Axles: Up to 600 pounds per inch of tire tread width (e.g., 13,200 pounds for 11-inch tires)
- Single Axle: Up to 20,000 pounds
- Tandem Axle: Up to 34,000 pounds
- Tridem Axle Group: Weight allowance is based on axle spacing
Divisible Load Exception Over 80,000 Pounds: On Idaho state highways, it’s possible to exceed 80,000 pounds gross weight without a special permit provided all axle weights remain legal and the vehicle is registered for at least its total gross weight. To operate on Interstate highways, an Annual Excess Weight Permit must be obtained.
Idaho Routine Limit: Idaho Oversize and Overweight Limits
Maximum Dimensions:
- Length: 110 feet
- Width: Up to 16 feet.
- Height: Up to 15 feet 6 inches.
Maximum Axle Weights With ID Overweight Permit:
Permitted Weight Ranges (varies by route and axle spacing):
Steering axle: The permitted weight is calculated at 600 pounds per inch of tire tread width (commonly 13,200 pounds for tires with 11-inch tread).
Single axle: Load range permitted is from 22,000 to 33,000 pounds.
Tandem axle: Load capacity allowed ranges between 38,500 and 56,000 pounds.
Tridem axle: Weight allowance is between 48,000 and 70,500 pounds
Note: Interstate routes typically allow the highest group axle weights.
- Superload Classifications: Loads that exceed these values are classified as superloads and require special review and routing.
Compare Transport LLC is the single STOP for all Oversize / Overweight permits with one easy-to-use application.
Idaho oversize permits validity period
To operate legally in Idaho, 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 Idaho trucking permits, including oversize, overweight, superload, IRP, IFTA, TRP, and temporary trip and fuel permits.
- Oversize / Overdimension Single Trip Permit
Validity: Valid for 5 consecutive days from the date of issuance.
Purpose: Authorizes movement of loads exceeding legal dimensions (width, height, length, or overhang). - Overweight Single Trip Permit
Validity: Also valid for 5 consecutive days.
Purpose: Necessary when either the total vehicle weight or axle load surpasses Idaho’s standard legal thresholds. - Oversize/Overweight Two Trip Permit
Validity: Valid for two moves within 7 days from the permit’s effective date.
Use Case: Designed for carriers needing a second trip without obtaining another separate permit. - Annual Oversize/Overweight Permit
Validity: Valid for 12 consecutive months from the date of issue.
Purpose: Allows repeated travel on Idaho state highways for specified overdimensional and/or overweight loads, under set conditions. - IRP Trip Permit (Temporary Registration)
Validity: Valid for 72 hours.
Use: For out-of-state carriers who do not have IRP (International Registration Plan) credentials but need temporary authority to operate in Idaho.
Purpose: Temporarily replaces IRP plates for the duration of the trip. - IFTA Trip Permit
Validity: Valid for 120 consecutive hours (5 days).
Use: Required for carriers not registered under the International Fuel Tax Agreement (IFTA) when operating in Idaho.
Purpose: Allows temporary fuel tax compliance without IFTA credentials. - Fuel Use Permit (Idaho Temporary Fuel Tax Permit)
Validity: Typically, valid for 5 days.
Use: For motor carriers not registered with IFTA, this permit allows operation in Idaho while meeting fuel tax obligations.
Note: Idaho enforces IFTA participation, so this permit is mostly for out-of-state carriers.
Operating Time Idaho:
Travel is generally permitted from 30 minutes before sunrise to 30 minutes after sunset, including weekends on most routes. Loads measuring up to 10 feet wide, 110 feet long, or 14 feet 6 inches high may be allowed to operate 24/7 on most routes, provided they comply with permit conditions and appropriate lighting requirements. Weekend daytime travel is typically authorized on many designated routes.
Restricted Travel Idaho:
Loads wider than 13 feet are not allowed to travel during high-traffic hours in cities such as Boise, Caldwell, Coeur d’Alene, Idaho Falls, Twin Falls, Lewiston, Garden City, and Chubbuck. The restricted timeframes are from 6:30 AM to 8:30 AM, 11:30 AM to 1:30 PM, and 4:00 PM to 6:00 PM. Additional travel limitations may apply during holidays, depending on the size and type of load.
Oversize Load Holiday Travel Restrictions in Idaho: Unless otherwise stated on the Idaho oversize load permit, movement of oversized vehicles is prohibited on major holidays, including New Year’s Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, and Christmas Day.
- Red-coded routes: Travel is not permitted after 2:00 PM on the day preceding a holiday or holiday weekend. Operations may resume at sunrise on the day following the holiday or weekend.
- Black-coded and interstate routes: For loads exceeding 10 feet in width, 100 feet in length, or 15 feet in height, travel is restricted after 4:00 PM on the day before the holiday. Movement may begin again at dawn the day after the holiday.
Seasonal Weight Restrictions:
In response to seasonal road conditions, Idaho enforces frost laws and spring breakup regulations, which may be reflected in issued oversize load permits. These rules help protect roads from damage during periods of thawing or adverse weather.
- The state may implement temporary limitations on vehicle size, weight, and speed depending on the situation. Four distinct weight categories may apply:
Legal maximum axle weights - 16,000 pounds per axle
- 14,000 pounds per axle
- 12,000 pounds per axle
Special Spring Breakup Limits (Two-lane roads): Width restrictions: Limited to 12 feet 6 inches under a special permit.
- Speed limit: Often reduced to 30 mph during spring breakup.
Axle & tire regulations:
– Minimum tire width of 10 inches
– Maximum 10,000 pounds per single axle with two single tires
– Maximum 14,000 pounds per axle with four or more tires
Oversize Restrictions on Roads and Bridges in Idaho
Idaho follows the Federal Bridge Formula, which outlines load limits and safety restrictions on bridges.
Additional road restrictions for oversize loads include:
- Entering or traveling through active construction zones.
- Ignoring warning signs or signals posted in these zones.
- Failing to yield to law enforcement, emergency responders, or other priority vehicles.
Important: All vehicles whether self-propelled or being towed must adhere to posted bridge weight limits.
Idaho Oversize Tire Regulation
- Tires must be in good operating condition, with a minimum tread depth of 2/32 inch.
- The weight allowed per tire is limited to 600 pounds per inch of tire width.
- Studded snow tires are allowed from October 1 through April 30.
- While there are no laws against tire chains, their use is encouraged only when necessary.
- Look for “Chains required beyond this point” signs in snowy or icy conditions.
Additional Tire Notes:
- Vehicles equipped with solid rubber tires must have at least 1 inch of rubber across the entire contact surface.
- Chains may be required on certain passes such as Lookout Pass, Fourth of July Pass (I-90), and Lolo Pass (State Highway 12). The state will issue advance warnings when chains are mandatory
Idaho Escort Requirement
- On Two-Lane Roads:
Length-Based Requirements: One escort is required if the overall vehicle length exceeds 100 feet.
Overhang-Based Escorts: If the rear overhang exceeds 25 feet, one escort is needed.
Width-Based Requirements:
– Over 12 feet: One escort
– Over 14 feet: Two escorts
– Over 16 feet: May require three escorts
Height: Over 16 feet requires one escort - On Interstate Highways:
Length-Based Requirements: Over 120 feet requires one escort.
Overhang-Based Escorts: Over 25 feet rear overhang requires one escort.
Width-Based Requirements:
– Over 15 feet: One escort
– Over 16 feet: May require two or three escorts
Height: Over 16 feet requires one escort
Idaho Banners, Lighting & Flage Requirement
All requirements are specified on the Idaho oversize permit. Loads that exceed legal width must display “Oversize Load” signs. Flags are required at all four corners and extremities of the load, and on any rear overhang exceeding 4 feet. Overweight-only loads are generally not required to have signs or flags.
Additional Information
All lift axles must be lowered to the ground if the load exceeds legal axle weight limits. Depending on the route and circumstances, components such as blades or buckets may be detached and placed on the same vehicle for transport. The final decision is made by the state on a case-by-case basis.
Idaho Oversize/Overweight Fee structure
Idaho 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:
Idaho Oversize and Overweight Permit Fees
Idaho Single Trip Oversize Permit: $28.00
Idaho Single Trip Oversize Permit (for loads exceeding 16 feet in width or height, or over 110 feet in length): $71.00
Two Trip Oversize Permit (valid for 2 trips within 7 days for loads exceeding 16′ wide, 16′ high, or 110′ long): $89.00
Standard Two Trip Oversize Permit: $33.00
Annual Oversize Permit: $43.00- Specialized Annual Oversize Permits – $43.00: Covers specific vehicle types and loads, such as:
Farm tractors over 9 feet wide on interstates
Implements of husbandry
Cylindrical hay bales (double-wide)
Tree-length logs and utility poles
Emergency removal of disabled vehicles
Mobile/modular homes
Certain types of construction or agricultural equipment - Weight and Length-Based Annual Permits
Annual Excess Weight Permit (for reducible loads exceeding 80,000 lbs. up to 105,000 lbs. on interstates): $43.00
Annual Extra Length Permit (for reducible loads): $43.00
Combined Excess Weight & Extra Length Annual Permit: $53.00 - Non-Reducible Load Permits
Single Trip Overweight (Non-Reducible): $71.00
Two Trip Overweight (Non-Reducible): $81.00
Single Trip Overweight/Oversize (Non-Reducible) exceeding 16 feet in width/height or 110 feet in length: $103.00
Two Trips Overweight/Oversize (Non-Reducible) within 7 days, exceeding limits above: $116.00
Annual Overweight/Oversize (Non-Reducible) Permit (valid for 12 months): $128.00 - 120-Hour Temporary Permit Fees
Power Unit registered in Idaho, trailer registered in Idaho or another state: No fee required
Power Unit not registered in Idaho, trailer registered in Idaho or another state: $60.00
Power Unit registered in Idaho, trailer not registered in Idaho or any state, or piggyback hauling: $60.00
Power Unit registered in Idaho with two or more unregistered trailers (in any state): $120.00 total (maximum charge regardless of the number of trailers)
Idaho Oversize Permits
Idaho Overweight Permits
Idaho Overhang Permits
Idaho Single Trip Permits
Idaho Super load Permits
Idaho Annual Permits
Frequently Asked Questions
You can reach Compare Transport LLC at 📞 630-222-5770 for all Idaho oversize permit services, including guidance, pricing, and applications. Their specialists are available to assist you immediately.
The cost of an Idaho oversize permit generally starts at $30, but the final price depends on the size, weight, and route of your load.
Idaho requires permits for loads that exceed 8 feet 6 inches wide, 14 feet high, or 80,000 pounds gross weight. Movement times, escorts, and lighting requirements may apply.
Yes, if your vehicle isn’t registered under the International Registration Plan (IRP), Idaho requires a trip permit for temporary travel.
Idaho oversize permits can be obtained online through our website comparetransportll.com or by calling us at 630-222-5770
Idaho’s legal load limits without a permit are up to 80,000 pounds gross, 8’6” wide, 14’ high, and 53’ trailer length. Anything exceeding these limits requires a special permit, which can be obtained through Compare Transport LLC.
Overweight permits in Idaho vary in price depending on axle configuration and total weight. Fees generally start around $30 to $50 and increase with the size of the load.
Idaho oversize permits can be obtained online through our website comparetransportll.com or by calling us at 630-222-5770
The official provisions can be found through our website comparetransportll.com available online.
Idaho enforces seasonal load limits during spring thaw (typically February to May) to protect roadways. Restrictions may reduce legal axle weights on certain routes.
The cost for an overweight permit in Idaho can range from $30 to several hundred dollars, based on weight and axle configuration.
You can obtain an Idaho trip permit online easily through Compare Transport LLC. They offer fast service for temporary trip permits without the hassle of direct state applications.
Applications for Idaho oversize permits can be submitted online via our website comparetransportll.com or by calling us at 630-222-5770
An Idaho trip permit generally costs around $30 and is valid for 72 hours.
Depending on the axle groupings and total weight, an Idaho overweight permit can range from $30 to over $200.
The phone number for assistance is 630-222-5770.
Oversize load movements are typically restricted during major holidays and holiday weekends. Movement is generally prohibited on New Year’s Day, Memorial Day, Independence Day, Labor Day, Thanksgiving, and Christmas.
Yes, you can get Idaho oversize permit online by calling us at 630-222-5770.
Yes, you can get Idaho oversize permit online by calling us at 630-222-5770.
Single-trip oversize permits cost $30, while annual permits are $250.
