What does a circular traffic sign with a blue background indicate?

A circular traffic sign with a blue background indicates an instruction or mandatory action that drivers must follow. Blue signs are typically used to convey specific commands or requirements, such as informing drivers of various restrictions or necessary behaviors on the road.

For example, a blue circular sign may instruct drivers to proceed with caution, follow a particular speed limit, or indicate where certain actions, like parking, are permitted. This is different from other types of signs, such as warning signs, which are usually triangular or diamond-shaped and colored yellow or orange to alert drivers to potential hazards ahead. Additionally, regulatory signs such as stop signs or no-entry signs often use a different shape and color combination to convey essential traffic rules.

In contrast, blue signs are designed to provide clear instructions that are mandatory for compliance.