Guide to Oversize and Overweight Trucking Permits in Texas

Hauling oversize or overweight (OS/OW) loads in Texas requires strict adherence to regulations set by the Texas Department of Motor Vehicles (TxDMV) and the Texas Department of Transportation (TxDOT). Under Title 43 of the Texas Administrative Code, any load exceeding the legal dimensions of 8 feet 6 inches in width, 14 feet in height, or 80,000 pounds in gross vehicle weight must obtain a permit before entering the state highway system. Texas manages one of the highest volumes of heavy-haul traffic in the United States, particularly within the energy and construction sectors, making route planning and permit compliance essential for legal operations. Motor carriers can utilize DispatchTool to streamline their operations by integrating permit-specific routing constraints into their daily workflows. The platform allows dispatchers to manage vehicle profiles and document storage, ensuring that active TxDMV permits are always accessible to drivers via mobile devices. This digital organization helps prevent violations and delays during roadside inspections or at weigh stations. Create a DispatchTool account to manage your fleet's documentation and route planning for heavy-haul operations.

Legal Dimensions and Weight Limits

In Texas, a load is considered oversize if it exceeds a width of 8 feet 6 inches, a height of 14 feet, or a length of 65 feet for a truck-tractor/semitrailer combination. The legal gross vehicle weight (GVW) limit is 80,000 pounds, with specific axle limits of 20,000 pounds for a single axle and 34,000 pounds for a tandem axle group. Anything exceeding these figures requires a specialized permit from the TxDMV Motor Carrier Division. Texas also enforces a bridge formula to protect infrastructure, which may restrict weights even if they fall below the maximum single-axle limit based on the distance between axle groupings.

Types of OS/OW Permits and Fees

Texas offers several permit types based on the duration and nature of the haul. A single-trip permit generally costs $60 plus a varying highway maintenance fee, while a 30-day permit is priced at $120. For high-volume carriers, 60-day permits cost $180 and 90-day permits are $240. The state also offers a 'Multi-State Western Regional Permit' for $30 plus individual state fees. Overweight permits involve additional costs; for example, a 2060/1547 permit for agriculture or energy equipment costs between $850 and $2,800 annually depending on the number of counties selected for operation.

Escort Vehicle Requirements

Escort requirements in Texas are triggered by specific load dimensions to ensure public safety on narrow or congested corridors. One front escort is typically required for loads exceeding 14 feet in width on two-lane highways. If a load exceeds 16 feet in width or 17 feet in height, two escorts—one front and one rear—are mandatory on all highways. For loads exceeding 18 feet in height, a front escort equipped with a height pole is required to clear overhead utility lines and overpasses. Escort drivers must have a valid driver's license and the vehicle must be equipped with amber flashing lights and 'Oversize Load' signage.

Operational Hours and Holiday Restrictions

Standard oversize travel in Texas is permitted from sunrise to sunset, seven days a week, unless otherwise restricted on the permit face. However, loads exceeding 14 feet in width or 16 feet in height are generally prohibited from traveling on Sundays. Major holidays—including New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving, and Christmas—carry additional restrictions where movement is prohibited starting at noon the day before the holiday and lasting until sunrise the day after. Curfew restrictions also apply in major metropolitan areas like Dallas, Houston, San Antonio, and Austin during peak traffic hours of 7:00 AM to 9:00 AM and 4:00 PM to 6:00 PM.

Superheavy and Large Load Procedures

Loads exceeding 254,300 pounds gross weight, or dimensions exceeding 20 feet in width or 18 feet 11 inches in height, are classified as 'Superheavy' or 'Large' loads. These applications require a minimum of 48 hours for TxDOT to perform a structural bridge analysis. In some cases, a physical route survey by the carrier is required to prove the load can clear all physical obstructions. The fee for a superheavy permit includes a $60 base fee plus a weight-based maintenance fee that can exceed $1,000 depending on the total displacement and mileage traveled.

Permit Application Process (TxPROS)

The Texas Permitting and Routing Optimization System (TxPROS) is the web-based tool used to apply for and issue permits. Most single-trip permits are auto-issued if the dimensions are within standard limits and the route is cleared by the system's GIS data. Carriers must provide the Year, Make, VIN, and License Plate of the power unit, along with the specific origin and destination addresses. If the system detects a conflict, such as a bridge with a load rating below the requested weight or a construction zone with narrow lanes, it will prompt the user to select an alternative route or wait for a manual technician review.

Sources

Texas Department of Motor Vehicles (TxDMV) (2024) — https://www.txdmv.gov/motor-carriers/oversize-overweight-permits Texas Administrative Code - Title 43 (2023) — https://texreg.sos.state.tx.us/public/readtac$ext.ViewTAC?tac_view=4&ti=43&pt=1&ch=28 Texas Department of Transportation (TxDOT) (2024) — https://www.txdot.gov/business/permits/oversize-overweight-permits.html

Frequently asked

What is the maximum weight allowed on a tandem axle in Texas?

The legal limit for a tandem axle is 34,000 pounds. With an overweight permit, this can be increased up to 46,000 pounds, provided the tires are rated for the load and the bridge formula is not violated.

Do I need a permit if my load is exactly 14 feet high?

No, 14 feet is the legal height limit in Texas. A permit is only required if the load exceeds 14 feet in height, though drivers should remain cautious as some older bridges may have lower clearances.

How much does a Texas 30-60-90 day permit cost?

A 30-day permit costs $120, a 60-day permit costs $180, and a 90-day permit costs $240. These permits are for width and length only, not for overweight loads.

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

Night travel is generally prohibited for oversize loads unless specifically authorized on the permit. Only loads that are overweight-only (legal dimensions) or those with minimal over-length may be granted 24/7 travel privileges.

What is the fine for hauling an oversize load without a permit in Texas?

Under Texas Transportation Code Section 621.501, fines for weight violations can range from $100 to $10,000 depending on the amount of excess weight and whether it is a repeat offense.