What does the blue circular sign indicate?
Signage: Vertical signs
Explanation
Mandatory pass on the right (R-401a)
- Blue circular sign with a white arrow: it is a **mandatory** sign.
- Placed on **traffic islands** or **refuges** to channel traffic.
- The **arrow** indicates the side on which you must pass. If it points to the right, you must **pass on the right** of the obstacle.
- It applies to **all vehicles** traveling on that stretch.
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