Correct answer
At least 100 metres or a minimum interval of four seconds.
At least 100 metres or a minimum interval of four seconds. The article provides both ways of expressing separation; 100 metres is not always the only alternative. Vehicles over 3,500 kg maximum authorised mass require 150 metres or six seconds. Also preserve sufficient space to avoid collision for the speed and conditions; the minimum alone does not guarantee avoiding every rear-end collision.
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At least 100 metres or a minimum interval of four seconds.
At least 50 metres, regardless of time interval or conditions.
Always 150 metres as the only alternative for a motorcycle.
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