When driving through an underpass or tunnel at the controls of a truck with a maximum authorized mass (MAM) of more than 3,500 kg and with no intention of overtaking, what is the minimum safety distance that must be kept from the vehicle ahead?

Question

DentroTest · Accepted Answer

The General Traffic Regulations (Article 95(6)) establish that inside tunnels or underpasses, when there is no intention to overtake, every driver must keep an increased safety distance from the vehicle ahead to avoid rear-end collisions and to facilitate emergency or evacuation maneuvers. For vehicles with a maximum authorized mass (MAM) of more than 3,500 kg, this mandatory minimum distance is 150 meters or an equivalent time interval of 6 seconds. The distance of 100 meters (or 4 seconds) corresponds to vehicles of up to 3,500 kg MAM, while 50 meters is insufficient in this type of infrastructure.

When driving through an underpass or tunnel at the controls of a truck with a maximum authorized mass (MAM) of more than 3,500 kg and with no intention of overtaking, what is the minimum safety distance that must be kept from the vehicle ahead?

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