Which statement about driver fatigue is correct?
Correct answer: D – Rest is the only cure for fatigue
Rest is the only cure for fatigue. Coffee, stimulants, and other drugs may temporarily mask tiredness, but they do not restore alertness or make fatigued driving safe. A tired driver should stop driving and obtain the needed rest rather than trying to push through the fatigue.
Source: Florida Commercial Driver’s License Manual — § 2.22.2, “Other Drugs”

