When driving inside a tunnel with no intention to overtake, what minimum separation must the driver of a truck keep from the vehicle ahead?

Question

DentroTest · Accepted Answer

In tunnels and underpasses, traffic regulations establish reinforced safety distances to avoid accidents and facilitate driving in enclosed environments. When there is no intention to overtake, drivers of vehicles whose maximum authorized mass (MAM) exceeds 3,500 kg, as is the case with heavy trucks, must keep a minimum separation of 150 meters or an equivalent of 6 seconds from the vehicle ahead. The combination of 100 meters or 4 seconds applies exclusively to vehicles with a MAM equal to or less than 3,500 kg, so the other combinations are incorrect under the regulations.

When driving inside a tunnel with no intention to overtake, what minimum separation must the driver of a truck keep from the vehicle ahead?

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