When driving a bus on a dual carriageway outside built-up areas that has three lanes in the same direction, are you permitted to overtake in the face of a vertical sign prohibiting overtaking for trucks?

Question

DentroTest · Accepted Answer

Sign R-306 prohibits trucks with a maximum authorized mass above 3,500 kg from overtaking motor vehicles, even when the maneuver does not involve entering the opposite lane (Official Catalog of Traffic Signs, Royal Decree 465/2025). It is aimed at those trucks: a bus is not affected, so it may overtake if circumstances allow. Nor is there a lane restriction for the bus that prevents it: an automobile of more than 3,500 kg, such as a bus, normally drives in the lane to its right, but may use the rest of the lanes in its direction when traffic or road circumstances so advise, without hindering those behind it (General Traffic Regulations, Article 31(1)); the limitation to the right-hand lane and the adjacent one on roads with three or more lanes applies to trucks or vans of more than 3,500 kg and to combined vehicles of more than 7 meters (Article 31(2)). Finally, the prohibition does not extend to all heavy vehicles, only to trucks of that mass.

When driving a bus on a dual carriageway outside built-up areas that has three lanes in the same direction, are you permitted to overtake in the face of a vertical sign prohibiting overtaking for trucks?

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