A yellow, diamond-shaped sign that alerts you to possible hazards is called a _________________.

A yellow, diamond-shaped sign is classified as a warning sign because it is designed to alert drivers to potential hazards or changes in road conditions that may require caution. These signs are essential for roadway safety, as they provide critical information about upcoming situations such as curves, pedestrian crossings, or slippery roads, enabling drivers to adjust their speed and driving behavior accordingly. The specific shape and color of the sign help convey its purpose quickly and effectively to ensure that drivers can recognize and react to hazards in a timely manner.

In contrast, while terms like "hazard sign," "caution sign," and "signal sign" may suggest similar meanings, they do not accurately describe the universally accepted terminology used in traffic signage. "Hazard sign" is not a standardized term for a specific type of sign, and "caution sign" is not the official designation used in traffic regulations. Additionally, "signal sign" typically refers to signs related to traffic signals, rather than the general warning category. Therefore, the correct classification of a yellow, diamond-shaped sign is indeed a warning sign.