On approaching the entrance to a road, what does the regulatory sign R-406 mean?

Question

DentroTest · Accepted Answer

Sign R-406 is a mandatory sign (circular, with a blue background) and means “Mandatory road for trucks, tractor units and vans”: it obliges drivers of all types of trucks, tractor units and vans, regardless of their mass, to drive on the roadway at whose entrance it is placed. If it carries a tonnage figure, on the silhouette or on a supplementary panel, the obligation applies only when the maximum authorized mass of the vehicle or combined vehicle exceeds that figure. It is not a roadway for mandatory use by the other motor vehicles with trucks prohibited, because the sign is aimed precisely at them. Nor is it a recommendation: advising a behavior is typical of information signs such as S-9 (advisable speed range), whereas this is an order that must be obeyed.

On approaching the entrance to a road, what does the regulatory sign R-406 mean?

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