Legal Weight Limits
Texas generally observes the federal 80,000 lb gross, 20,000 lb single-axle, 34,000 lb tandem-axle limits on Interstates, and state law applies the same base limits on non-Interstate highways (with a 2,000 lb gross allowance for natural gas and electric trucks, up to 82,000 lb).
By statute, Texas states its axle limits as “including all enforcement tolerances”, so there is no free tolerance for ordinary loads – but an annual permit under §623.011 allows 5% over gross and 10% over axle weight, effectively up to 84,000 lb GVW and 22,000 lb per single axle on state roads. This permit tolerance does not apply on Interstate highways due to federal compliance requirements.
Texas also has numerous commodity-based exceptions codified in law: for example, ready-mix concrete trucks are allowed 23,000 lb on one single axle and 46,000 lb on tandem axles, with an extra 10% tolerance if gross is under 69,000 lb and a permit is held. Vehicles hauling certain recyclables, milk, cotton, grain, agricultural products, or solid waste have higher weight allowances on non-Interstate roads (under commodity-specific permits or exceptions in Chapter 622 and 623 of the Transportation Code).
Texas state law explicitly permits gross weights beyond 80,000 lb on specific configurations by permit – e.g. permitted axle groups may reach 25,000 lb single, 46,000 lb tandem, and 60,000 lb tridem, and county-issued permits allow heavier loads on certain county routes. Two consecutive tandems whose outer axles are at least 36 ft apart may carry 68,000 lb combined (34k each) without a permit. Bridge formula and tire weight laws still apply (tires may not carry more than their sidewall rating; 650 lb per inch of tire width under permit).
In summary, Texas weight law is flexible: it adheres to federal limits on Interstates, but on state highways many trucks operate heavier via permits (annual and commodity permits can cover gross weights well above 80,000 lb for certain commodities). Oilfield and heavy equipment moves can reach even higher weights under super-heavy permits.
Overweight Fine Structure
Texas employs a tiered fine schedule defined by statute (Tex. Transportation Code §621.506) based on how many pounds over the limit a truck is. For gross weight violations, the fine ranges are: under 2,500 lb over – $100 to $500; 2,500–5,000 lb over – $500 to $1,000; 5,001–10,000 lb – $1,000 to $2,500; 10,001–20,000 lb – $2,500 to $5,000; 20,001–40,000 lb – $5,000 to $7,000; and over 40,000 lb – $7,000 to $10,000. (Judges have discretion to set the exact fine within those ranges, so a 8,000 lb-over case might incur, say, ~$1,500.)
For axle-group violations only (where gross is within limit but an axle is overweight), Texas uses slightly lower brackets – e.g. an axle 3,000 lb over is fined $500–$1,000, and an axle >5,000 lb over is $1,000–$2,500 max. These fines are per offense; multiple overweight axles can each incur separate penalties.
Furthermore, Texas imposes steep enhancements for repeated or egregious cases: a third overweight conviction within a year doubles the maximum fine (e.g. a >40k over offense could reach $20,000). If a truck is caught over the weight allowed by a permit it failed to obtain, an extra $500–$1,000 fine is added (or $2,500–$5,000 for subsequent offenses).
Notably, carrying a load above 84,000 lb that could reasonably be dismantled (i.e. illegal without a permit) also triggers an extra $500–$1,000 fine on first offense (or $2,500–$5,000 for subsequent offenses). These penalties are misdemeanor fines under Texas law, handled in justice or municipal court. A general $100–$250 fine applies to weight offenses that fall outside the axle and gross tiers. In sum, a first-time minor overweight in Texas might cost a few hundred dollars, whereas a major overload or repeat offense can reach five figures in fines.
Enforcement Methods
Texas has an extensive enforcement system, especially near freight corridors and the Mexican border. The Texas Department of Public Safety (DPS) Commercial Vehicle Enforcement Service oversees weigh stations (“commercial vehicle inspection stations”) on major highways. Weigh-in-Motion sensors embedded on approaches pre-screen trucks, and enforcement officers target likely violators for static weighing.
DPS also runs dedicated “Commercial Vehicle Enforcement” troopers with portable scales for surprise checks on farm-to-market roads and oilfield areas. The state has strict penalties for bypassing scales or failing to stop: refusing to stop and be weighed when directed is a misdemeanor with fines up to $200 (up to $500 or $1,000 and possible jail time for repeat offenses within a year), and repeated avoidance may even lead to arrest.
Along the southern border, Texas uses high-tech methods – weigh stations on arterial routes from border ports, roving inspection teams, and even virtual weigh stations with cameras – to catch overweight trucks leaving international bridges.
If a truck is found more than 5% over the gross limit, Texas law requires it to shed the excess before continuing. Vehicles overweight on an axle must first shift the load, then offload cargo (or wait for additional axles/vehicles to transfer load) until they comply with legal weight. Exceptions allow livestock and agricultural products in their natural state to proceed to a destination without unloading.
Texas also works closely with county constables and local police in some areas who enforce weight limits on local roads and issue county citations. Overall, Texas combines significant fine deterrents with robust on-the-ground enforcement – especially targeting chronic areas like oilfields, timber regions, and import/export corridors – to protect its highways.