Falling Asleep at the Wheel: A California Liability Guide | HHJ
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What Happens When a Driver Falls Asleep Behind the Wheel?

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Founding partner of HHJ Trial Attorneys Elliott Jung black and white portrait

Gerry Spence Trial Lawyers College

Adam copy

University of California, Berkeley

Updated: August 25, 2025

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Driving is a demanding task that requires a driver’s full attention at all times. An accident can happen quickly when there is only a momentary lapse in focus. Falling asleep while driving is extremely dangerous and surprisingly common. Unlike a distraction, which takes the driver’s attention off the road for a couple of seconds, falling asleep means that the driver has no control over their vehicle, significantly increasing the risk of being involved in a road accident.

Drowsy driving accidents typically occur late at night, early in the morning, or during the mid-afternoon energy slump. The effects of sleep deprivation mimic the impairment caused by alcohol consumption. In many cases, drowsy driving is classified similarly to alcohol in terms of legal negligence and reckless behavior.

What Happens When a Driver Falls Asleep at the Wheel?

When a driver falls asleep, their vehicle can drift into another lane, run off the road, or collide with other vehicles and obstructions. Because the driver is unconscious or semi-conscious, the chances of a severe accident are high. Without the expected corrective actions, such as braking and steering, the vehicle’s momentum remains unchecked, often resulting in head-on collisions at high speeds.

The harm done can be catastrophic for the people affected. Other drivers, passengers, pedestrians, and cyclists can suffer serious injuries or death as a result of a fatigued driver. Injuries can include head trauma, spinal injuries, and broken bones. The emotional and financial toll for victims and their families can also be overwhelming. Medical expenses, lost income, and long-term care costs can have a permanent effect on financial stability.

Who Is Liable in a Drowsy Driving Accident?

Legally, falling asleep while driving is treated as negligence. Every driver has a duty of care to operate their vehicle safely and responsibly. Driving while tired or drowsy violates this duty because it’s well known that fatigue impairs driving ability. If a crash occurs because a driver fell asleep, they can be held liable for the resulting damages. Victims may pursue a personal injury claim or wrongful death lawsuit to recover their losses for fatigued driver car crash injuries.

In some cases, the driver may also face criminal charges, especially if the accident results in serious injury or death. Their charges can include reckless driving or vehicular manslaughter. The determination between the two depends on the driver’s behavior leading up to the accident. For example, driving excessively long hours without rest or ignoring the warning signs of fatigue can be considered reckless or grossly negligent.

What Factors Affect Liability in a Drowsy Driving Case?

While falling asleep at the wheel is typically a clear form of negligence, several factors can influence the legal outcome of an accident. These factors can include the duration of the driver’s sleep deprivation, whether the driver took appropriate measures to avoid driving while fatigued, and whether external factors contributed to drowsiness, such as the use of prescription medications or underlying medical conditions.

People with young children often experience exhaustion. However, they may not be able to skip work to sleep in. It’s unfortunate, but many parents don’t have the freedom to stay home while their children are still inconsistent sleepers. Tragically, exhausted parents with demanding jobs are far more likely to be involved in serious, fatigue-related car accidents.

In some cases, employers may also share liability, especially if a commercial driver is at fault. Trucking companies and other commercial businesses are subject to strict regulations designed to prevent fatigue-related crashes, including maximum driving hours and mandatory rest periods. If an employer fails to enforce these rules or encourages drivers to break the rules, they can be held partially responsible.

Proving liability requires a thorough investigation of the accident, using eyewitness accounts, surveillance footage, black box data, and accident reconstruction. Legal professionals often rely on expert testimony to establish the circumstances and cause of the accident. Once liability is established, the injured party can file a claim and pursue compensation from the appropriate person or business.

What Should You Do After a Drowsy Driving Accident?

Should you or a family member be injured in an accident caused by a driver who fell asleep, it’s vital to seek legal advice from an experienced San Diego car accident lawyer. The team of legal experts at HHJ Trial Attorneys will help you navigate complex insurance claims and legal procedures. Additionally, documentation plays a critical role in accident claims. Medical records, police reports, and witness statements can strengthen a compensation claim.

How Can a Lawyer Help After a Drowsy Driving Accident?

Falling asleep while driving has consequences for the driver and other road users. Fatigued driving can have serious consequences, such as significant property damage, catastrophic injury, and death. Legally, such incidents are considered negligence; however, several other factors must also be taken into account. In severe cases, the fatigued driver may even face criminal charges for the damage they cause.

Contact HHJ Trial Attorneys to schedule a consultation. Together, we will review your case and discuss what you can expect from the legal process. If you have suffered damages, you have the right to seek compensation even if the driver wasn’t willfully reckless. Your current and future physical and financial health must be taken care of, and we can help you do that.

professional attorney and founding partner of HHJ Elliott Jung
Elliot H. Jung

Gerry Spence Trial Lawyers College

Elliot H. Jung is a trial attorney at HHJ Trial Attorneys who focuses on helping injured clients navigate complex personal injury cases. With an emphasis on advocacy, case strategy, and client support, he works to secure fair outcomes for people facing medical bills, lost wages, and other accident-related losses. His approach combines legal experience with a commitment to clear communication and effective representation.

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