Answer and explanation

Correct answer: B. To leave room to react and stop

  1. Step 1: A fixed time gap scales with your speed. Step 2. Choose a landmark and count two seconds after the car ahead passes it. Answer: To leave room to react and stop. Why not the others: To measure your speed accurately in km/h: the rule measures time gaps, not speed. To decide when to start overtaking another car: it is a following-gap rule. To limit the time spent on a motorway journey: it has nothing to do with journey length.

Practise more Following distance and traffic conditions.

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