What does it mean when a traffic sign is yellow?

A yellow traffic sign serves as a warning to drivers. It is designed to alert them to potential hazards or changes in road conditions ahead. This could include situations such as curves, pedestrian crossings, or areas where there are increased risks, such as school zones. The purpose of these signs is to encourage drivers to be more cautious, reduce speed, and stay alert for any unexpected events.

The other choices represent different functions of traffic signs. Stop signs are universally recognized as red octagons, signaling drivers to come to a complete stop. Speed limit signs are typically white with black lettering, indicating the maximum legal speed. Mandatory action signs, often depicted in circular shapes with specific instructions, require drivers to take certain actions, such as yielding or turning. Understanding that yellow signs indicate warnings is essential for safe driving and anticipating road conditions.