What type of sign is represented by a circle with a diagonal line through it?

A sign that features a circle with a diagonal line through it is indicative of a prohibition sign. These types of signs are specifically designed to communicate that a certain action or behavior is not allowed. For example, a no parking sign or a no U-turn sign utilizes this visual format to clearly convey restrictions to drivers.

The circular shape indicates that it is a regulatory sign, and the diagonal line crossing through it emphasizes the prohibition. The purpose is to ensure that drivers and pedestrians understand the restrictions in that area, which helps maintain safety and order on the road.

This design is universally recognized, making it effective for communicating important rules that must be followed to prevent accidents and maintain traffic flow.