The Top Causes of Semi-Truck Accidents on Alabama Highways

The leading causes of semi-truck accidents in Alabama are driver fatigue, distracted driving, speeding, inadequate vehicle maintenance, improper cargo loading, and impaired driving. According to the Alabama Department of Transportation (ALDOT), thousands of crashes involving commercial trucks occur on Alabama roads each year, with a significant share resulting in serious injuries or fatalities. These collisions are not random events. In almost every case, they trace back to a specific failure—by the driver, the trucking company, the shipper, or a combination of all three—that was entirely preventable.

How Does Driver Fatigue Cause Truck Accidents?

Fatigue is one of the most dangerous and underreported factors in semi-truck accidents. The FMCSA’s Large Truck Crash Causation Study found that 13 percent of commercial motor vehicle drivers were considered fatigued at the time of their crash. Research from the Insurance Institute for Highway Safety (IIHS) shows that truck drivers behind the wheel for more than eight hours are twice as likely to be involved in a collision.

The human body is not built for the kind of schedule the trucking industry demands. Long-haul drivers regularly operate 70 or more hours per week, often during nighttime hours when the body’s natural circadian rhythm pushes toward sleep. The monotony of highway driving—mile after mile of flat, straight road like the long stretch of I-65 between Mobile and Montgomery—compounds the problem.

A fatigued driver’s reaction time slows, their attention drifts, and their ability to judge speed and distance deteriorates. At 65 miles per hour, a fully loaded 80,000-pound truck needs roughly 525 feet to come to a complete stop. A driver who is even a fraction of a second late recognizing a hazard can close that gap in a matter of seconds.

Federal Hours of Service (HOS) regulations exist to address this risk. Under current FMCSA rules, property-carrying drivers are limited to 11 hours of driving within a 14-hour on-duty window, followed by a mandatory 10-hour rest break. Drivers must also take a 30-minute break after eight cumulative hours of driving and cannot exceed 60 hours in seven days or 70 hours in eight days. Since 2017, electronic logging devices (ELDs) have been required to track compliance, making it much harder to falsify records than in the paper logbook era.

Despite these safeguards, violations still occur. Some drivers push through mandatory rest periods to meet tight delivery schedules. Some carriers build schedules that effectively force drivers into violation. And some companies look the other way when their drivers consistently max out their available hours. When a fatigued driver causes a crash, both the driver and the carrier may be held accountable.

What Role Does Distracted Driving Play in Truck Accidents?

Distracted driving is a factor in a large percentage of truck crashes across Alabama. ALDOT data indicates that crashes caused by improper lane changes, failure to yield, and failure to see another person or object—all behaviors associated with inattention—account for roughly 31.6 percent of commercial truck crashes in the state.

Distractions inside the cab are the primary culprit. A driver checking a dispatch app on their phone, adjusting a GPS unit mounted on the dash, eating a meal, or reaching for something on the passenger seat takes their eyes off the road and their hands off the wheel at a time when they are controlling a vehicle that can weigh 40 tons. At highway speed, looking at a phone for just five seconds means the truck travels the length of a football field essentially blind.

External distractions also contribute. Rubbernecking at a crash scene on I-10 through the Wallace Tunnel in Mobile, reading roadside signs, or being momentarily distracted by construction activity on U.S. 98 near Spanish Fort can all lead to the kind of delayed reaction that turns a manageable situation into a catastrophic collision.

FMCSA regulations specifically prohibit commercial motor vehicle drivers from texting or using a handheld mobile phone while driving. A violation can result in fines of up to $2,750 for the driver and $11,000 for the carrier. But the regulations only work if they are enforced, and enforcement on the open highway is inherently limited.

Why Is Speeding So Dangerous for Semi-Trucks?

Speeding is consistently one of the top contributing factors in fatal crashes across Alabama. ALDOT’s Drive Safe Alabama campaign identifies excessive speed as a primary cause of deadly collisions statewide. For semi-trucks, the physics of speed are unforgiving.

An 80,000-pound truck traveling at 65 miles per hour carries roughly 20 times the kinetic energy of a passenger car at the same speed. That energy has to go somewhere when the truck stops suddenly—and it is absorbed by whatever is in the truck’s path. Speeding reduces the driver’s ability to steer safely around curves, increases the distance needed to stop, and magnifies the force of impact in a collision.

Speeding is particularly dangerous at specific locations in South Alabama:

• The long downhill approaches to the I-10 Bayway crossing Mobile Bay, where heavy trucks build speed and brake systems are under maximum stress.
• The Highway 59 corridor through Foley and Loxley, where commercial truck traffic mixes with beach-bound tourist traffic during summer months and holiday weekends.
• The I-65 interchange with I-10 in Mobile, one of the busiest freight intersections in the Gulf Coast region, where merging traffic and tight ramp geometry create constant conflict points.
• Construction zones on U.S. 98 and the Baldwin Beach Express, where reduced lanes and shifting traffic patterns demand lower speeds that not every driver respects.

When a truck driver is speeding and causes a collision, the trucking company may also face liability if it sets unrealistic delivery schedules or uses compensation structures that incentivize drivers to speed.

How Do Maintenance Failures Lead to Truck Accidents?

A semi-truck is a complex machine with thousands of components that must function properly to operate safely. Brakes, tires, steering systems, coupling devices, lighting, and suspension components all require regular inspection, maintenance, and replacement. When they fail, the consequences are often catastrophic.

FMCSA regulations require motor carriers to systematically inspect, repair, and maintain every vehicle under their control. Drivers are also required to perform pre-trip and post-trip inspections and report any defects. Despite this, the FMCSA’s Large Truck Crash Causation Study identified defective brakes and other vehicle components as frequent contributing factors in serious truck crashes.

Common maintenance-related failures that cause accidents include:

• Brake failure or degradation: Worn brake pads, leaking air lines, improperly adjusted brakes, and overheated brake drums are among the most common mechanical causes of truck accidents. A truck with brakes adjusted just 20 percent below their required stopping capability can add dozens of feet to its stopping distance at highway speed.
• Tire blowouts: Underinflated tires, bald tread, overloaded axles, and tires that have been retreaded beyond safe limits can all lead to sudden blowouts. When a steer tire on the front axle fails, the driver can lose control almost instantly.
• Steering and suspension failures: Worn tie rods, damaged kingpins, and broken leaf springs can compromise the driver’s ability to maintain directional control, particularly at highway speed or during evasive maneuvers.
• Lighting failures: Non-functioning tail lights, brake lights, or clearance lights make a truck invisible to other drivers at night or in poor visibility. Rear-end collisions with stopped or slow-moving trucks are a direct result.
• Coupling device failures: A faulty fifth wheel, worn kingpin, or improperly secured trailer hitch can cause a trailer to separate from the tractor at speed—one of the most terrifying scenarios on any highway.

When a maintenance failure causes an accident, liability may extend to the trucking company, a third-party maintenance provider, or even the manufacturer of the defective component.

Can Improperly Loaded Cargo Cause an 18-Wheeler Accident?

Absolutely. The way cargo is loaded, distributed, and secured on a trailer directly affects the truck’s handling, stability, and stopping ability. An improperly loaded truck is a rolling hazard:

• Overloaded trailers put excessive strain on the truck’s braking system, tires, and frame. Every commercial truck has a gross vehicle weight rating (GVWR) and individual axle weight limits. Exceeding them increases stopping distance and raises the risk of tire and brake failure.
• Unevenly distributed cargo shifts the truck’s center of gravity, making it prone to rollovers during turns, lane changes, and highway curves. Rollover accidents on the I-10 Bayway and the elevated sections of I-65 through Mobile are a persistent problem.
• Unsecured cargo can shift during transit, causing the trailer to sway or jackknife. In some cases, cargo breaks free and spills onto the roadway, creating secondary hazards for other vehicles.

FMCSA cargo securement rules (49 CFR Part 393, Subpart I) set specific requirements for how different types of freight must be restrained. The shipper, the loading company, and the driver all share responsibility for compliance. When improperly loaded cargo contributes to a crash, each of these parties may face liability.

Is Impaired Driving a Factor in Alabama Truck Accidents?

Yes, though it accounts for a smaller share of truck crashes than some other causes. FMCSA regulations prohibit commercial drivers from operating a vehicle with a blood alcohol concentration (BAC) of 0.04 percent or above, half the legal limit for passenger vehicle drivers in Alabama. Drivers are also subject to mandatory pre-employment drug testing, random testing throughout their employment, and post-accident testing.

Despite these measures, some drivers operate under the influence of alcohol, illegal drugs, or improperly used prescription medications. Stimulants like amphetamines have historically been used by some long-haul drivers to stay awake on extended runs.

Over-the-counter medications that cause drowsiness, such as certain cold and allergy treatments, can also impair driving ability. The FMCSA’s Large Truck Crash Causation Study found that both legal and illegal drug use were among the associated factors in a significant number of serious truck crashes.

Do Road Conditions and Weather Contribute to Truck Crashes in Alabama?

South Alabama’s climate creates specific hazards for commercial trucks. Heavy rain during the Gulf Coast storm season reduces visibility and creates hydroplaning risks, particularly on the low-lying sections of I-10 across Mobile Bay. Fog is a recurring problem on the Bayway and the Causeway during fall and winter mornings. And while snow and ice are rare this far south, they do occasionally affect roads in the northern parts of Baldwin County, catching drivers off guard.

Poor road conditions—potholes, degraded pavement, inadequate drainage, missing or obscured signage, and poorly designed construction zones—can also contribute to accidents. But a professional truck driver is expected to adjust their speed and driving behavior to match the conditions. When a driver fails to slow down in rain, fog, or a construction zone, the legal issue is not the weather itself—it is the driver’s failure to respond to it appropriately.

How Long Do You Have to File a Truck Accident Claim in Alabama?

Alabama’s statute of limitations for personal injury claims is two years from the date of the accident under Alabama Code § 6-2-38. Wrongful death claims must be filed within two years of the date of death under § 6-5-410(d). Product liability claims may have a shorter two-year deadline under § 6-5-502. Because the investigation needed to determine the cause of a truck accident requires pulling ELD data, maintenance records, driver qualification files, and dispatch logs—much of which can be overwritten or destroyed if not promptly preserved—early action is critical.

Talk to Our Seasoned Attorneys About Your Alabama Truck Accident

If you or a family member has been injured in a semi-truck accident on I-65, I-10, U.S. 98, Highway 59, or any road in Baldwin or Mobile County, the attorneys at Stone Crosby, P.C. can investigate the cause of the crash and identify every responsible party. Contact our office today at (251) 626-6696 or reach out to us online to schedule an initial consultation.