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Sleep-related crashes are most likely to turn fatal on morning drives, according to a study by Sleep Junkie.
It’s estimated that at least one in 25 adult drivers fall asleep behind the wheel of a moving vehicle, the data showed, with the National Highway Traffic Safety Administration (NHTSA) reporting over 1,500 deaths each year due to drivers nodding off behind the wheel.
“Many people underestimate the risks of driving while tired, but the science is clear,” said Meg Riley, a certified sleep science coach.
“Sleep deprivation can be just as impairing as alcohol,” she added. “When you get behind the wheel without enough rest, you’re not only endangering yourself, but everyone else on the road. The good news is that these tragedies are preventable.”
The most dangerous roads for fatal sleep-related driving accidents are interstates, according to the study, and while both interstates and U.S. highways can travel across state lines, interstates tend to have fewer on-off points and no cross traffic—meaning interstate travelers drive for longer stretches of time with few opportunities to rest.
Meanwhile, U.S. highways are considered the second-most-dangerous road type, with the most accidents for sleepy drivers taking place between 6 a.m. and 7 a.m.
Most dangerous conditions and vehicles:
- Rain, fog, and early dawn light were commonly linked to fatal crashes. Poorly lit roads make drowsy driving even more dangerous.
- Larger vehicles—including SUVs, vans, and heavy trucks—were often involved, with rollover risks increasing the chance of fatal outcomes.
“Getting adequate sleep, knowing when to pull over and recognizing the signs of drowsiness can dramatically reduce risk,” Riley said. “Just like we have campaigns against drunk driving, we need the same urgency for drowsy driving; it’s a public health issue that affects every commuter, traveler, and family on the road.”
Tips on how to avoid drowsy driving:
- Prioritize sleep: Aim for 7–9 hours before long trips.
- Take breaks: Stop every 2 hours or 100 miles.
- Avoid peak danger hours: If possible, skip early morning drives after a poor night’s rest.
- Stay stimulated: Share driving duties, listen to engaging audio, or schedule calls.
- Watch for warning signs: Frequent yawning, heavy eyelids, or drifting lanes mean it’s time to pull over.
- Use rest stops, not willpower: Coffee and energy drinks can only do so much; real rest is the safest solution.
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