An estimated 145 million U.S. adults—61% of the adult population—have driven while drowsy at least once, and nearly 35 million do so monthly, according to data highlighted by the National Sleep Foundation (NSF). With insufficient sleep stemming from various causes, drowsy driving risk rises significantly, making it crucial for drivers to prioritize sleep and recognize when they are not fit to drive.
A fall-asleep crash can be fatal in an instant. Yet four in 10 adults—about 108 million people in the U.S.—fail to recognize the basic warning signs of drowsy driving. This critical knowledge gap means drivers may not realize when they are too tired to drive safely. The NSF produces Drowsy Driving Prevention Week®, an annual campaign that educates the public about the importance of sleep for safe driving and encourages drivers to “Sleep First. Drive Alert.®” Preventing drowsy driving starts with choices made before getting behind the wheel, such as prioritizing adequate sleep. These habits can help individuals, families, and friends recognize risks and make safer decisions on every drive.
Automotive technology may offer support. Driver-alertness systems are increasingly common in new cars, designed to detect signs of sleepiness and fatigue, and intended to help prevent drowsy driving crashes. Public acceptance is growing: an estimated 91 million U.S. adult drivers support requirements for alertness technology in all new vehicles, and a similar number favor including sleep and drowsy-driving education in driver licensing. However, while 58% of adults are familiar with driver-alertness monitoring, only 31% have ever used it—revealing a significant opportunity to increase understanding, access, and adoption. Privacy concerns remain, with 62% of adults worried that data collected by such systems could be misused. Combining advanced technology with public education and data privacy protections can help build trust in systems designed to keep roads safer.
Warning signs of drowsy driving are often overlooked. Basic indicators include frequent blinking, nodding off, difficulty keeping eyes open, and drifting out of lane. Recognizing these signals early is vital because drowsiness slows reaction times and increases crash risk. Drivers who notice any warning sign should pull over to a safe place and take a break before continuing.
Above all, the first and best step to be alert behind the wheel is to get the sleep needed. When warning signs are present, the safest decision is not to drive. If tired or struggling to keep eyes open, drivers should reschedule trips, delay departure until alert, or change plans. If travel is necessary, asking a trusted friend or family member to drive, taking a taxi, or booking a rideshare are safer options. For more tips and expert resources, visit theNSF.org to make a personal plan to prevent drowsy driving and become your Best Slept Self®.
The NSF is an independent nonprofit organization dedicated to improving health and well-being through sleep education and advocacy. Founded in 1990, it has promoted sleep health for more than 35 years through expert recommendations, consensus guidelines, tech standards, and easy-to-use tools. As drowsy driving remains a widespread risk, the combination of public awareness, personal responsibility, and emerging technology could help reduce crashes and save lives.
