What does the color yellow on a traffic sign indicate?

The color yellow on a traffic sign is universally recognized as an indicator of caution or a warning regarding potential hazards. Yellow signals to drivers that they should be alert and prepared for something that may require their attention or action. This could include situations such as upcoming sharp turns, pedestrian crossings, school zones, or road work. The use of yellow is designed to enhance visibility and encourage drivers to exercise caution as they approach these areas.

In contrast, other colors, such as red, typically indicate the need to stop or yield, whereas green usually signifies permission to proceed. Understanding the significance of yellow helps ensure safety by alerting drivers to the need for reduced speed or heightened awareness in specific zones.