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What is a microsleep and why is it especially dangerous at highway speed?
- A.A planned 20-minute nap at a rest area
- B.A deep sleep stage reached only at night
- C.A type of sleep apnea treatment
- D.A brief, involuntary sleep episode lasting seconds during which the vehicle travels a long distance with no driver control
Correct answer
D. A brief, involuntary sleep episode lasting seconds during which the vehicle travels a long distance with no driver control
Why
In a microsleep the brain briefly shuts down without the driver choosing to sleep. At 55 mph a truck covers about 80 feet per second, so even a few seconds means hundreds of feet traveled blind.
Manual topic: Fatigue - Microsleep · From the General Knowledge practice bank (GK-259).