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BDifficulty 1/5

Under low nighttime illumination, visual acuity generally...

Correct answer

It is reduced

It decreases: details, obstacles and colours are harder to distinguish than in good daylight. The effect depends on illumination, dark adaptation and individual vision, so no single percentage applies to every driver and situation. Adapt speed to visible distance, use appropriate lighting without dazzling, and keep windows and lamps clean.

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  • It does not change

  • It is reduced

  • It increases

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