What does a red circle with a diagonal line symbol indicate?

The red circle with a diagonal line symbol is universally recognized as indicating that an action is prohibited. This type of sign is commonly used to communicate restrictions such as "No Turn" or "Do Not Enter," alerting drivers to avoid specific maneuvers that could be dangerous or unlawful. The use of a red background signifies a strong warning, and the diagonal line reinforces the message of prohibition, making it clear to drivers that they should not engage in certain behaviors in that area.

Understanding this symbol is crucial for safe driving practices, as disregarding such signs can lead to accidents or legal consequences. The other options refer to permissions or instructions that do not apply to the red circle with a diagonal line, which is solely focused on prohibiting specific actions.