Skip to main content
Search Background

The Dangers of Driving Tired

Submitted by paul on December 20, 2011
Driver Safety
Why drowsy driving is as dangerous as driving drunk
Driving Tired

Nearly 20% of vehicle accidents in industrialized countries are attributed to driver fatigue.

Driving while tired is dangerous. A European study published in the Journal of Sleep Research found that prolonged nighttime driving can be as dangerous as driving while intoxicated, with nearly 20% of motorized vehicle accidents in industrialized countries attributed to driver fatigue. The psychological and physiological effects of driving drunk and driving drowsy are virtually the same. If you were planning to pull an all-night drive this holiday season, stop and rethink your choice.

Symptoms of Driver Fatigue

Common indicators include feeling groggy, sleepy, or exhausted. If you find yourself yawning constantly behind the wheel, it's time to take a break. Other symptoms include daydreaming, stiffness, heavy eyes, and slow reactions. If traveling with a passenger, ask them to monitor your driving—key signs include drifting in and out of your lane, problems steering, and lulls in conversation. If driving alone, not being able to remember the last few seconds or minutes of driving is a clear warning sign.

When You're at Risk

Your body's energy levels naturally drop at certain times due to circadian rhythms. Try to avoid driving during natural energy lows: between 10 p.m. and 6 a.m. and from 2 p.m. to 4 p.m. According to the US National Highway Traffic Safety Administration, driver fatigue accounts for an estimated 100,000 crashes every year, resulting in 71,000 injuries and 1,500 fatalities.

  • Avoid alcohol, large meals, or medications that may cause drowsiness.
  • Establish a realistic driving plan with healthy break periods.
  • Stay hydrated—coffee helps, but grab water between cups to prevent dehydration.
  • Open the window or turn on the radio, but be careful of overstimulation.
  • Share the driving with a passenger whenever possible.
  • If driving alone, take a break at least every two hours.

Age Is a Factor

The older you get, the harder it is to stay alert for extended periods. Shift workers, truck drivers, and underage car rental drivers are also at increased risk for fatigue-related crashes. Feeling drowsy? Don't get behind the wheel. Arrive alive!

Don't Risk It

Sleepy driving impairs alertness and response time, greatly increasing your chances of being involved in an accident. When in doubt, pull over and rest.

Plan a Safe Trip

Review more car rental safety tips and compare rental options from trusted independent agencies.

Compare Car Rentals

Blog post categories