Like alcohol, drowsiness can slow reaction time, impair judgement and decrease awareness of your surroundings. The concept of microsleeps — momentary lapses in concentration — can lead to loss of control of the vehicle or respond to dangers on the road. Being awake and alert behind the wheel is just as important as not being under the influence.
Crashes caused by drowsy driving tend to be severe because the driver may not attempt to brake or swerve to avoid a collision, so the resulting impact occurs at a high rate of speed.
One-third of crashes involving a drowsy driver result in injuries, and more than 17% of fatal crashes involve driver fatigue.
Drowsy Driving Facts

Know the Warning Signs
Stay alert and stay safe. If you notice any of the following, it’s time to take a break from driving.
- Having trouble keeping your eyes open and focused.
- Yawning frequently, nodding off or having trouble keeping your head up.
- Drifting from your lane or tailgating.
- You miss signs or drive past your exit.
- Not remembering the last few miles driven.
Tips to Stay Awake While Driving
What can you do to stay alert behind the wheel?
- Get a good night’s sleep. Aim for at least seven hours of sleep per night.
- Travel at times of the day you are normally awake. Avoid driving when tired or sleepy.
- Avoid heavy foods and medications that cause drowsiness.
- Travel with an alert passenger and take turns driving.
- Schedule a break every two hours or every 100 miles. Plan breaks in advance, rather than waiting until you’re already feeling drowsy.