What does the color yellow indicate on a traffic sign?

The color yellow on a traffic sign is universally recognized as a warning signal, indicating potential hazards or changes in road conditions ahead. It serves to alert drivers to be cautious and prepared for situations that may require a change in speed or attention. Yellow signs are often used to convey important information such as curves in the road, pedestrian crossings, and school zones. This makes drivers aware that they should proceed with caution.

In contrast, other colors used in traffic signs have different meanings. For example, red typically signifies prohibitions or the requirement to stop, blue conveys information about services, and green is often used for directional guidance. Therefore, understanding the meaning of yellow signs is crucial for safe driving and recognizing areas where extra vigilance is essential.