What effective solution for tiredness is available to the driver?

1. Turning on the fog lights.
2. Correct answer: Stopping and resting.
3. Adjusting the speed to his level of tiredness (driving slower the more tired he is).
4. Turning on the wipers and solving a cryptic crossword.

WhyOnce you are tired, the most effective thing is to stop and rest. Speed, music or puzzles will not help.