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BDifficulty 2/5

A driver under the influence of alcohol may...

Correct answer

Perceive traffic signs less accurately.

Perceive signs, lights, distances and speeds less accurately. Alcohol can impair attention, promote sleepiness and increase sensitivity to glare; it does not improve vision or driving safety. Effects vary with circumstances, and feeling able to drive does not prove abilities are unimpaired.

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  • Perceive traffic-light signals better because of alcohol.

  • Perceive traffic signs less accurately.

  • Distinguish vehicle lights better because of alcohol.

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