Kansas Oversize and Overweight Permit Requirements

In Kansas, you need an oversize permit if your vehicle or load exceeds the legal dimensions of 8 feet 6 inches in width, 14 feet in height, or 59 feet 6 inches in length for a single semi-trailer. Vehicles exceeding these dimensions, or those surpassing the federal bridge formula weight limit of 80,000 pounds gross vehicle weight, must obtain a permit from the Kansas Department of Transportation (KDOT) before entering the state or moving on public highways. Failure to secure these permits can result in significant fines and the immediate grounding of the equipment until compliance is met. DispatchTool helps carriers manage these requirements by providing truck-safe routing that identifies KDOT-restricted corridors and bridge height limitations. The platform allows dispatchers to attach scanned permits directly to load records, ensuring drivers have digital access to necessary documentation at weigh stations or during roadside inspections. By centralizing permit management within the dispatch workflow, fleets reduce the risk of routing errors that lead to costly delays or structural damage. To start managing your state-specific compliance documents, create a DispatchTool account.

Legal Width and Height Limits in Kansas

The maximum legal width for any vehicle on Kansas highways is 8 feet 6 inches. Any load exceeding this width, even by an inch, requires a permit. For height, the maximum legal limit is 14 feet. It is critical to note that while the limit is 14 feet, many older bridges on secondary state routes may have clearances as low as 13 feet 6 inches. If your load exceeds 14 feet, KDOT requires a specific permit and may necessitate a front escort vehicle equipped with a height pole to ensure safe passage under overhead obstructions and utility lines.

Maximum Length and Overhang Regulations

Kansas allows a maximum length of 59 feet 6 inches for a single semi-trailer and 28 feet 6 inches for each trailer in a twin-trailer configuration. The overall length for a tractor-trailer combination is not specifically limited on designated highways, provided the trailer remains within its legal length. However, for specialized hauling, any overall length exceeding 125 feet generally requires at least one escort. Rear overhang is limited to 3 feet in the front and 4 feet in the rear; exceeding these measurements requires red flags during the day and red lights at night, along with a formal oversize permit.

Weight Limits and Federal Bridge Formula

The gross vehicle weight (GVW) limit in Kansas is 80,000 pounds without a permit. Axle weight limits are set at 20,000 pounds for a single axle and 34,000 pounds for a tandem axle group. Kansas utilizes the Federal Bridge Formula to determine if a vehicle's weight is distributed safely across its axles. If your load exceeds these weights but remains under 150,000 pounds, you can typically apply for a routine overdimensional permit. Loads exceeding 150,000 pounds are classified as 'Superloads' and require a detailed bridge analysis by KDOT engineers, which can take 5 to 10 business days to process.

Permit Types and Associated Costs

KDOT offers several permit types based on the frequency of travel. A single-trip permit is valid for seven days and typically costs $20 for oversize loads and between $20 to $50 for overweight loads, depending on the excess tonnage. For carriers frequently moving standardized equipment, an annual permit is available for approximately $200, allowing unlimited trips for loads up to 12 feet 6 inches wide and 14 feet high. Note that these fees are subject to change and do not include the service fees charged by third-party permit wire services.

Escort Vehicle Requirements (Pilot Cars)

Escort requirements in Kansas are triggered by specific dimensions. One escort is required if the width exceeds 14 feet on two-lane highways or 14 feet 6 inches on multi-lane highways. Two escorts (front and rear) are required for loads exceeding 16 feet in width. If a load is over 14 feet high, a front escort with a high-pole is mandatory. Escort drivers must be at least 18 years old and possess a valid driver's license, though Kansas does not currently require a specific state-certified pilot car license like some neighboring states.

Kansas Turnpike (KTA) Special Rules

The Kansas Turnpike (I-35 from Oklahoma to Emporia, I-335 from Emporia to Topeka, and I-70 from Topeka to Kansas City) operates under different regulations than standard KDOT roads. The KTA allows for 'Long Combination Vehicles' (LCVs) up to 125 feet in length without a special permit, provided the carrier has an annual LCV permit. However, width is strictly capped at 12 feet for night travel on the Turnpike. Any load exceeding 12 feet 6 inches in width requires a KTA authorization number in addition to the standard KDOT permit.

Daylight and Holiday Travel Restrictions

Oversize loads in Kansas are generally restricted to travel from one-half hour before sunrise to one-half hour after sunset. Night movements are permitted for loads that are only 'overweight' but stay within legal dimensions. Movement is prohibited on major holidays, including New Year’s Day, Memorial Day, Independence Day, Labor Day, Thanksgiving, and Christmas. If a holiday falls on a Monday or Friday, restrictions often extend to the entire weekend, preventing the movement of loads exceeding 12 feet 6 inches in width.

Sources

Kansas Department of Transportation (KDOT) Trucking Portal (2024) — https://www.ksdot.org/burTruckReg/ Kansas Highway Patrol (KHP) Commercial Vehicle Guide (2024) — https://www.kansashighwaypatrol.org/ American Transportation Research Institute (ATRI) State Laws (2023) — https://truckingresearch.org/

Frequently asked

What is the maximum width I can haul in Kansas without an escort?

You can haul up to 14 feet wide on two-lane roads and 14 feet 6 inches on multi-lane highways before a single escort is required. Once you exceed 16 feet in width, two escorts are mandatory.

How much does a Kansas oversize permit cost?

A standard single-trip oversize permit costs $20 and is valid for a period of 7 calendar days. Overweight permits start at $20 and increase based on total weight and axle configuration.

Can I travel at night with an oversize load in Kansas?

Night travel is generally prohibited for loads exceeding 8 feet 6 inches in width or 14 feet in height. However, loads that are only overweight but meet all legal size dimensions are typically allowed to travel 24/7.

Do I need a permit for a 14-foot high load in Kansas?

No, 14 feet is the legal height limit in Kansas. You only need a permit if your load exceeds 14 feet 0 inches. However, always check your route for low clearances, as some bridges are marked at 13 feet 6 inches.

Is a permit required for farm equipment in Kansas?

Kansas provides exemptions for 'custom harvesting' and certain agricultural machinery moved between fields or for repair during daylight hours. However, if the equipment is being transported by a commercial carrier for hire, standard permit rules apply.