As the holidays approach, more than 100 million Americans are expected to hit the road to visit friends and family. Road trips can be filled with excitement and tradition, but they also come with risks that too often get overlooked. One of the most dangerous is drowsy driving, a problem as real as drunk or distracted driving, yet not taken as seriously.
Why drowsy driving is so dangerous
Driving while sleep-deprived isn’t just about feeling groggy. The science is sobering: after 17 hours awake, your reaction times are similar to someone with a blood alcohol content of 0.05%. Stay awake 24 hours, and your impairment is closer to 0.10%, beyond the legal limit for drunk driving. Even if you don’t completely fall asleep, “microsleeps” lasting just a few seconds can happen. At highway speeds, that’s enough to travel the length of a football field without your eyes on the road.
The National Highway Traffic Safety Administration estimates at least 91,000 crashes each year involve drowsy drivers. Independent analyses suggest the true number may be far higher, with up to 6,000 deadly crashes annually linked to fatigue.
The hidden holiday risk
The timing of holiday travel makes this issue even more pressing. Long drives after late-night packing sessions, early-morning departures to “beat traffic,” or mid-afternoon stretches after a big meal are all high-risk windows for drowsy driving. Younger drivers, shift workers, and anyone with an untreated sleep disorder like sleep apnea are particularly vulnerable.
It’s also a cultural blind spot. Surveys show that while most adults would refuse to drive after a few drinks, only about half say they would avoid driving after getting too little sleep. The truth is simple: fatigue impairs your brain, your reflexes, and your judgment just like alcohol does.
Signs you shouldn’t ignore
Drowsy driving doesn’t announce itself with flashing warning lights. Instead, it creeps in through yawns, heavy eyelids, drifting between lanes, or forgetting the last few miles you drove. If you notice these signs, they are not an invitation to “push through.” They are a clear signal to stop, rest, and reset.
How to protect yourself and your family
The best prevention starts before you turn the key. Getting 7–9 hours of sleep for several nights before a big trip is the single most important step. Plan your driving around the times you’re naturally more alert, avoiding the midnight-to-6 a.m. window and the post-lunch slump when your circadian rhythm dips. Bring a travel companion if possible, trade driving duties, and schedule breaks every couple of hours.
And remember: caffeine is a useful tool, but it’s not a cure. Once it wears off, fatigue will catch up again. A short nap in a safe spot does far more for your alertness than blasting the radio or rolling down the windows.
Learn More
Sometimes the problem goes deeper than a single night of poor sleep. Loud snoring, gasping at night, morning headaches, or persistent daytime sleepiness can all point to sleep apnea or another disorder that makes driving unsafe. The good news: these conditions are treatable, and testing can often be done at home.
At Somnology, we believe safe driving starts with healthy sleep. Our at-home sleep testing, clinician-reviewed data, and tailored care plans help you identify and treat the sleep issues that make you vulnerable behind the wheel. This holiday season, protect your loved ones on the road by protecting your sleep first.
Sources:
- AAA Foundation for Traffic Safety. (2015, November). Prevalence of self-reported drowsy driving. AAA Foundation for Traffic Safety. https://aaafoundation.org/wp-content/uploads/2017/12/PrevalenceOfSelfReportedDrowsyDrivingReport.pdf
- Centers for Disease Control and Prevention. (2017, May 2). Data and statistics: Sleep and sleep disorders. U.S. Department of Health & Human Services. https://www.cdc.gov/sleep/data-research/facts-stats/index.html
- Dawson, D., & Reid, K. (1997). Fatigue, alcohol and performance impairment. Nature, 388(6639), 235. https://doi.org/10.1038/40775
- National Highway Traffic Safety Administration. (2019, July 22). Drowsy driving. U.S. Department of Transportation. https://www.nhtsa.gov/risky-driving/drowsy-driving
- National Sleep Foundation. (2025). Drowsy Driving Prevention Week®. National Sleep Foundation. https://www.thensf.org
- Poudel, G. R., Innes, C. R., Bones, P. J., Watts, R., & Jones, R. D. (2014). Losing the struggle to stay awake: Divergent thalamic and cortical activity during microsleeps. Human Brain Mapping, 35(1), 257–269. https://pubmed.ncbi.nlm.nih.gov/23008180/
- Scott, L. D., Hwang, W. T., Rogers, A. E., Nysse, T., Dean, G. E., & Dinges, D. F. (2007). The relationship between nurse work schedules, sleep duration, and drowsy driving. Sleep, 30(12), 1801–1807. https://pubmed.ncbi.nlm.nih.gov/18246989/