When driving inside a tunnel with no intention of overtaking, what minimum gap must a truck with a maximum authorized mass (MAM) of more than 3,500 kg keep from the vehicle ahead?

Question

DentroTest · Accepted Answer

The traffic regulations establish that inside tunnels and underpasses, every driver with no intention of overtaking must keep a safety distance sufficient to avoid a collision in the event of sudden braking and to allow being overtaken. For vehicles with a maximum authorized mass (MAM) of more than 3,500 kg, this minimum mandatory gap to the vehicle ahead is 150 meters or an equivalent interval of 6 seconds. The 100 meters (or 4 seconds) apply only to vehicles of up to 3,500 kg MAM, while 50 meters is a totally insufficient distance and contrary to the regulations in these structures.

When driving inside a tunnel with no intention of overtaking, what minimum gap must a truck with a maximum authorized mass (MAM) of more than 3,500 kg keep from the vehicle ahead?

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