What do black symbols on a yellow background indicate?

Black symbols on a yellow background indicate a warning. This color combination is used to alert drivers to potential hazards, changes in road conditions, or other important safety information that requires attention. The bright yellow background ensures high visibility, making it easier for drivers to notice and react to warnings about dangers such as curves in the road, pedestrian crossings, or slippery conditions.

In contrast, other signage options use different color schemes and configurations. For instance, guide signs typically utilize different colors and shapes to provide directional assistance or information without signifying a potential risk. Regulatory signs have a more formal appearance, often employing white backgrounds with black or red letters to denote laws that must be followed. Construction signs usually feature bright orange colors to indicate active work zones and alert drivers to special conditions.