Driver fatigue is one of the deadliest factors in commercial trucking. A fatigued truck driver operating an 80,000-pound vehicle at highway speed is as dangerous as a drunk driver — studies show that being awake for 18 hours impairs reaction time and judgment equivalent to a blood alcohol concentration of 0.08%, the legal limit. Despite federal hours-of-service regulations designed to prevent fatigued driving, the trucking industry’s relentless pressure to deliver on time pushes thousands of drivers to operate while dangerously exhausted. McFarlane Law represents victims of truck driver fatigue accidents across Texas, pursuing the trucking companies whose business practices put profits over public safety.

The Science of Fatigue and Truck Driving

Human fatigue is not simply a matter of feeling tired — it is a physiological condition that profoundly impairs cognitive function, reaction time, and decision-making. Research from the National Transportation Safety Board (NTSB) has found that fatigue is a contributing factor in approximately 13% of all commercial truck crashes, though many experts believe the actual figure is higher because fatigue is difficult to detect after the fact. A fatigued driver experiences microsleeps — involuntary episodes of sleep lasting two to ten seconds that occur without the driver’s awareness. At 65 mph, a five-second microsleep carries a truck the length of a football field with no driver input. Fatigue also degrades a driver’s ability to perceive and respond to changing traffic conditions: lane drift becomes more frequent, following distances shrink, and the driver’s ability to make rapid steering or braking corrections deteriorates. Circadian rhythm disruptions — caused by overnight driving, irregular schedules, and insufficient sleep between shifts — compound the problem. Truck drivers who operate during the body’s natural low-alertness periods (2:00–4:00 AM and 2:00–4:00 PM) are at significantly elevated crash risk.

Federal Hours-of-Service Rules and Industry Violations

The FMCSA’s hours-of-service (HOS) regulations set maximum driving and duty limits for commercial motor vehicle operators: 11 hours of driving within a 14-hour on-duty window, followed by a mandatory 10-hour rest period, with a weekly cap of 60 or 70 hours. The 2017 mandate requiring electronic logging devices (ELDs) was intended to eliminate paper logbook falsification, which had been endemic in the industry. However, violations persist through multiple schemes: some drivers use multiple ELD accounts, others drive during “off-duty” time while logging themselves as resting, and some carriers swap drivers without properly recording the change. Trucking companies that compensate drivers on a per-mile basis create powerful financial incentives to exceed HOS limits — the more miles driven, the more money earned, regardless of the driver’s fatigue level. Company dispatchers who assign loads requiring unrealistic transit times force drivers to choose between violating HOS rules or losing loads and income. When a fatigued driver causes a crash, the trucking company’s scheduling practices and compensation structure are directly relevant to establishing liability.

Proving Fatigue in a Truck Accident Case

Unlike alcohol impairment, fatigue cannot be measured by a simple test at the crash scene. Building a fatigue case requires a thorough investigation of the driver’s activities in the days leading up to the crash. McFarlane Law obtains ELD records showing the driver’s logged hours, then cross-references those records with fuel receipts, toll records, GPS data, truck stop surveillance footage, and cell phone records to determine whether the driver was actually resting during logged off-duty periods. We examine the driver’s sleep history through medical records, sleep study results, and testimony about sleep conditions (quality of sleeper berth, noise, temperature). Phone records often reveal that drivers were making calls, sending texts, or using apps during periods logged as rest. We also investigate whether the driver has been diagnosed with or exhibits symptoms of obstructive sleep apnea, a condition that is estimated to affect 28% of commercial truck drivers and significantly degrades sleep quality even when adequate time is allocated for rest.

Holding Trucking Companies Accountable for Fatigue Crashes

Texas law holds trucking companies vicariously liable for the negligent acts of their drivers committed within the scope of employment. Beyond vicarious liability, trucking companies can be held directly liable for negligent hiring (failing to screen for fatigue-related issues during the hiring process), negligent supervision (failing to monitor ELD compliance and identify fatigued driving patterns), and negligent entrustment (assigning loads to drivers with known fatigue issues or HOS violations). When a company’s scheduling and compensation practices systematically encourage fatigued driving, the company’s conduct may rise to the level of gross negligence, making exemplary (punitive) damages available under Texas law. McFarlane Law builds comprehensive cases that connect the driver’s fatigue to the trucking company’s operational decisions. We retain human factors experts who testify about the effects of the specific fatigue conditions involved, and economists who quantify the full lifetime cost of injuries caused by fatigued driving crashes. Contact our team at (512) 222-4900 (Austin) or (432) 803-5000 (Odessa) for your free case evaluation.

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