At this point, it is important to pull off the road safely and avoid driving until you feel rested again. Ignore these signals and you may suddenly find yourself veering toward the shoulder of the road or crossing over into a lane of oncoming traffic.

The best way to prevent such potentially disastrous scenarios is to take measures that combat drowsiness before it starts. Drowsiness can strike drivers at any time, but statistics show that crashes are most like to occur in the midafternoon and at night, when our body's daily rhythmic activity cycle, known as circadian rhythms, is most likely to experience sleepiness, according to the National Sleep Foundation.

Extra caution in the spring

During daylight-saving time, use extra caution when driving during these times. If possible, you may want to avoid driving at all in late afternoons and evenings until your body adjusts to daylight-saving time.

Tips for staying awake

Also keep the following tips in mind after daylight-saving time starts, but also at any time when you may be short on sleep:

• During long drives, take rest breaks every 100 miles or two hours
  
  
• Do not drive long distances at mid-afternoon or night
  
  
• Avoid sedating medications (e.g., cold tablets and antihistamines) before driving
  
  
• Abstain from alcohol, even in small amounts
  
  
• Reschedule long drives on roads that are rural, dark or have dull scenery
  
  
• Split the driving duties with someone else when traveling long distances
  
  
• Get at least seven to nine hours of sleep each night
  
  
• If you’re tired but must drive, drink something caffeinated or have a 15- to 20-minute nap before driving