Alabama Weigh Stations and Commercial Vehicle Enforcement

Commercial vehicle enforcement in Alabama is managed by the Alabama Law Enforcement Agency (ALEA) in coordination with the Alabama Department of Transportation (ALDOT). The state operates permanent weigh stations primarily along major interstate corridors including I-10, I-20, I-59, I-65, and I-85. These facilities are designed to ensure compliance with weight limits, safety regulations, and tax requirements. Alabama law requires all commercial vehicles with a Gross Vehicle Weight Rating (GVWR) or Gross Vehicle Weight (GVW) of 10,000 pounds or more to enter open weigh stations unless they are equipped with a state-approved electronic bypass system. Efficient trip planning is critical for maintaining delivery schedules while complying with these legal stops. DispatchTool allows carriers to manage trip documentation and dispatch instructions while considering the routing impacts of scale locations across the Southeast. By integrating load data with truck-safe routing, the platform helps drivers stay informed of their legal obligations on Alabama highways. You can create a DispatchTool account to streamline your fleet's document management and load tracking for all Alabama-bound hauls.

Alabama Weight Limits and Statutory Regulations

Alabama Code Section 32-9-20 governs the weight and dimensions of vehicles operating on state highways. The maximum gross weight allowed on Alabama interstates is 80,000 pounds, provided the vehicle meets the Federal Bridge Formula requirements. Single axles are limited to 20,000 pounds, while tandem axles are restricted to 34,000 pounds. For vehicles operating off the interstate system, Alabama allows a slightly higher tolerance on certain state roads, capped at 84,000 pounds for five-axle combinations, though this does not apply to the interstate network where federal limits are strictly enforced by ALEA Marine Police and Highway Patrol divisions.

Permanent Scale Locations and Operations

Alabama maintains several high-volume permanent scales at strategic entry points. Key locations include the I-65 scales near Athens (Northbound/Southbound) at mile marker 361, which monitor traffic between Huntsville and the Tennessee border. The I-10 scales near Grand Bay at mile marker 1 serve as a primary checkpoint for traffic entering from Mississippi. On the eastern side, the I-85 scale near Cusseta at mile marker 74 monitors freight moving between Montgomery and Atlanta. Most permanent facilities are equipped with Weigh-In-Motion (WIM) technology, allowing officers to prescreen trucks for weight violations at speeds up to 30 miles per hour before directing them to the static scales.

Electronic Bypass Systems: PrePass and Drivewyze

Alabama is a participating member of the PrePass and Drivewyze networks, which allow qualified carriers to bypass open scales. According to ALEA, carriers with high safety scores (ISS) are granted bypasses based on their carrier profile and weight data transmitted via WIM sensors. Data from the American Transportation Research Institute (ATRI) suggests that bypassing a single weigh station saves a carrier approximately $8.68 in fuel and time costs. In Alabama, transponder-based systems like PrePass are widely supported at all major interstate facilities, while software-based systems like Drivewyze provide bypass opportunities at both permanent sites and mobile enforcement locations.

Mobile Enforcement and Portable Scales

Beyond permanent facilities, the ALEA Motor Carrier Safety Unit utilizes mobile enforcement teams equipped with portable scales. These units operate on secondary routes such as US-80, US-231, and US-43 to prevent 'scale dodging' by overweight vehicles. Mobile units have the authority to pull over any commercial vehicle for a Level I, II, or III North American Standard Inspection. Carriers found in violation of weight limits via portable scales are subject to the same fine structures as those at permanent sites, often requiring the offloading of excess cargo before the vehicle can proceed, leading to significant delays and recovery costs.

Fines and Penalties for Weight Violations

Fines for overweight violations in Alabama are calculated based on the degree of the infraction. Under Alabama Code 32-9-5, the fine for the first 1,000 pounds of excess weight is typically nominal, but the scale increases significantly as the weight grows. For example, a vehicle exceeding its limit by more than 5,000 pounds may face fines exceeding $500 plus court costs for a first offense. Repeat offenders within a 12-month period face doubled fines and potential suspension of registration. Furthermore, failing to stop at an open weigh station is a separate misdemeanor offense that can result in immediate detention and a mandatory inspection.

Oversize and Overweight Permitting

For loads exceeding the standard 80,000-pound limit or standard width/height dimensions, ALDOT requires an Oversize/Overweight (OSOW) permit. A single-trip permit for an overweight load costs $10.00 plus a processing fee, while annual permits for specific commodities like sealed containers or agricultural products range from $100.00 to $500.00. Vehicles operating under these permits must carry the physical or digital permit at all times and adhere to specific travel curfews, typically restricted to daylight hours from 30 minutes before sunrise to 30 minutes after sunset, and restricted movement during major holidays.

Sources

Alabama Law Enforcement Agency (ALEA) Motor Carrier Safety (2024) — https://www.alea.gov Alabama Department of Transportation (ALDOT) Permitting (2024) — https://www.dot.state.al.us American Transportation Research Institute (ATRI) (2023) — https://truckingresearch.org Code of Alabama 1975 Section 32-9-20 (2024) — https://alisondb.legislature.state.al.us

Frequently asked

Which vehicles are required to stop at Alabama weigh stations?

All commercial vehicles with a GVWR of 10,000 pounds or more must stop at open Alabama weigh stations. This includes rental trucks used for business purposes and empty commercial combinations.

Does Alabama use Weigh-In-Motion (WIM) technology?

Yes, Alabama uses WIM sensors at major sites like I-65 Athens and I-10 Grand Bay. These sensors allow ALEA to screen trucks at highway speeds, only pulling in vehicles that appear to exceed the 80,000-pound limit or have safety credential issues.

What is the fine for bypassing an open scale in Alabama?

Bypassing an open scale is a violation of state law that can result in a fine of approximately $200 to $500 depending on the jurisdiction, plus additional court costs and a mandatory safety inspection by ALEA.

Are there specific hours for weigh station operations?

Alabama weigh stations do not have fixed public schedules; they operate 24 hours a day at the discretion of ALEA. High-traffic corridors like I-65 and I-20 are frequently open during peak freight hours between 6:00 AM and 10:00 PM.

What is the maximum width allowed without a permit in Alabama?

The maximum legal width for a commercial vehicle in Alabama is 8 feet 6 inches (102 inches). Any load exceeding this width requires an ALDOT oversize permit and may require escort vehicles depending on the total width.