When traveling through a tunnel or underpass with no intention of overtaking, what minimum safety distance must be kept from the vehicle ahead?

Question

DentroTest · Accepted Answer

The General Traffic Regulations establish that, when traveling through tunnels or underpasses with no intention of overtaking, drivers of vehicles whose maximum authorized mass (MAM) does not exceed 3,500 kg (a category that includes mopeds, passenger cars and motorcycles) must keep a minimum safety distance of at least 100 meters from the vehicle ahead, or an equivalent time interval of at least 4 seconds. The 150-meter option (or 6 seconds) corresponds to heavy vehicles with a MAM above 3,500 kg and combined vehicles, while 50 meters is a completely insufficient distance, contrary to the regulations, inside these infrastructures.

When traveling through a tunnel or underpass with no intention of overtaking, what minimum safety distance must be kept from the vehicle ahead?

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