Correct answer
At least 100 metres or a minimum four-second interval.
Maintain at least 100 metres or a minimum four-second interval. For vehicles with a maximum authorised mass over 3,500 kg, the rule is at least 150 metres or six seconds. Always adapt the gap to conditions so you can stop without a collision; the rule is not identical for every vehicle.
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50 metres always suffice, whatever the speed.
At least 100 metres or a minimum four-second interval.
Every passenger car must leave 150 metres, with no time-based alternative.
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