Traffic Signs

What does the R-406 road sign mean?

Reviewed on 26 Jul 2026

Question image: What does the R-406 road sign mean?
  • A Roundabout - mandatory direction
  • ✓ Carriageway for lorries
  • C Only permitted directions
  • D Carriageway for motor vehicles, except two-wheeled motorcycles without sidecar

Why this is the correct answer

Obligation for drivers of all kinds of lorries, regardless of their weight, to use the carriageway at whose entrance the sign is placed. The inscription of a figure in tonnes, either on the silhouette of the vehicle or on a supplementary plate, means that the obligation only applies when the maximum authorised mass of the vehicle or vehicle combination exceeds that figure.

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