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BDifficulty 2/5

A passenger car enters thick fog that greatly reduces visibility. How must it adapt its speed?

Correct answer

Reduce it as needed to stop within the visible distance.

Reduce speed as needed to stop within the visible distance and increase the gap. Use appropriate lighting: in this car, thick fog requires the rear fog light in addition to the applicable other lights. Switch it off when no longer needed to avoid dazzling others. Do not drive along the shoulder to continue your journey.

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  • Increase it to leave the fog sooner.

  • Reduce it as needed to stop within the visible distance.

  • Always maintain the same speed even as visibility decreases.

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