When traveling inside a tunnel behind another vehicle with no intention of overtaking it, what is the minimum front safety distance that must be kept?

Question

DentroTest · Accepted Answer

Traffic regulations establish that, when traveling inside tunnels or underpasses with no intention of overtaking, every driver of a vehicle with a maximum authorized mass (MAM) of 3,500 kg or less (such as mopeds, passenger cars or motorcycles) must keep a minimum safety distance of at least 100 meters or an equivalent interval of 4 seconds from the vehicle ahead. The 150-meter option (or 6 seconds) corresponds to vehicles with a MAM above 3,500 kg, while 50 meters is a clearly insufficient and unlawful distance under the special conditions of confinement and risk that a tunnel presents.

When traveling inside a tunnel behind another vehicle with no intention of overtaking it, what is the minimum front safety distance that must be kept?

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