When are circular yellow signs typically used in driving?

Circular yellow signs are used primarily to signal warnings or caution. These signs are designed to alert drivers to potential hazards or changes in road conditions ahead. For example, a circular yellow sign may indicate a warning for a curve, a pedestrian crossing, or a school zone, prompting drivers to reduce speed and remain vigilant.

The distinctive shape and color of these signs make them easily recognizable, allowing drivers to quickly understand that they need to pay attention to the road and adjust their driving accordingly. This emphasis on caution helps improve safety for both drivers and pedestrians by encouraging more careful driving behavior when approaching potentially dangerous situations.