Correct answer
At least 150 metres, or a minimum interval of 6 seconds.
As a general rule, inside a tunnel, if you do not intend to overtake, you must leave a distance from the vehicle in front of 100 metres or a time interval of 4 seconds. For vehicles with an MAM of more than 3500 kg, this distance must be at least 150 metres or 6 seconds.
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At least 100 metres, or a minimum interval of 4 seconds.
At least 50 metres and a distance that allows you to stop in the event of sudden braking.
At least 150 metres, or a minimum interval of 6 seconds.
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