On encountering this circular sign with a blue background and the silhouette of a truck, what must the driver understand by it?

Question

DentroTest · Accepted Answer

Sign R-406 belongs to the group of mandatory signs (circular, with a blue background). It requires drivers of all kinds of trucks, tractor units and vans or light vans, regardless of their mass, to drive on the roadway at whose entrance it is placed. If the sign carries a tonnage figure, on the silhouette or on a supplementary panel, the obligation applies only to vehicles whose maximum authorized mass (MAM) exceeds that figure. That is why it is not an indication of recommended and preferred use but an obligation, nor a prohibition on entry, which would carry a circle with a red border.

On encountering this circular sign with a blue background and the silhouette of a truck, what must the driver understand by it?

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