How to prevent tiredness

2–6 a.m.

• Follow your body clock: Most accidents happen at low points between 2-6 a.m. and 2-4 p.m.
• Get off the road, find somewhere safe to park, and take a nap.

1–2 cans

• Drink one to two cans of a high-caffeine energy drink or two cups of coffee, then nap for
  20 minutes to allow the caffeine effect to kick in.

7–8 hours

• Catnaps help but are no substitute for a good night’s sleep (seven to eight hours).
• Sleep debt built up over a series of disturbed or short nights’ sleep can be made up with two good, consecutive nights’ sleep.
• Avoid alcohol
• Plan journey breaks at safe stops, taking into account long stretches of monotonous road, such as motorways, and vulnerable times.
• Listen to your body: If you feel sleepy, you need sleep.
• Rest is never a substitute for sleep.
• Avoid alcohol and medications that cause drowsiness.