What is the meaning of circular blue vertical signs?
Signage: Vertical signs
Explanation
The **blue circular vertical signs** indicate an **obligation**. These signs are part of the vertical signs placed on poles or structures on roads and streets. Their main function is to **compel** drivers to follow a certain action or behavior on the road.
- Vertical signs are divided into three categories according to their function: warning of dangers, obligating or prohibiting, and informing and guiding.
- Blue circular signs belong to the category that **compels** drivers to perform a specific action, such as following a certain direction or using a specific lane.
Therefore, when you see a blue circular vertical sign, you should know that it is indicating an **obligation** that you must comply with while driving.
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