What does a yellow warning sign indicate?

Answer: C — Potential hazards or changes in road conditions ahead

A yellow warning sign indicates potential hazards or changes in road conditions ahead. These signs are designed to alert drivers to situations that may require increased caution or adjustments in driving behavior. The color yellow is specifically chosen because it is associated with caution and warning, drawing the attention of drivers to the need for vigilance. For example, a yellow warning sign may indicate a sharp turn, animal crossing, slippery road, or other situations that may pose a risk. By recognizing these signs and responding appropriately, drivers can help prevent accidents and ensure safer travel. In contrast, other signs represent different types of information. Mandatory action signs, typically red, indicate actions that must be followed, such as stop or yield. Speed limit signs inform drivers of the maximum allowable speed in a particular area, while road work signs indicate that construction or maintenance is occurring, often accompanied by specific directions or warnings regarding the work zone. Each type of sign plays a crucial role in maintaining road safety and effective traffic flow.