When driving a truck with a maximum authorized mass above 3,500 kg and entering a tunnel with no intention of overtaking, what minimum safety distance must you keep from the vehicle in front?

Question

DentroTest · Accepted Answer

The General Traffic Regulations set specific rules on the safety distance inside tunnels and underpasses when there is no intention of overtaking. For vehicles with a maximum authorized mass (MAM) above 3,500 kg, such as heavy trucks, a minimum frontal gap of 150 meters or an equivalent time interval of at least 6 seconds must be kept. By contrast, the distance of 100 meters (or 4 seconds) applies to vehicles with a MAM of 3,500 kg or less. The reference to 50 meters or to the general stopping rule does not apply to the special rule for tunnels and underpasses.

When driving a truck with a maximum authorized mass above 3,500 kg and entering a tunnel with no intention of overtaking, what minimum safety distance must you keep from the vehicle in front?

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