What color is typically used for the background of warning signs?

Warning signs are typically designed with a yellow background to alert drivers to potential hazards or changes in road conditions. The usage of yellow is intentional, as it is a color that captures attention and is associated with caution. It signals to drivers that they should slow down and pay closer attention to what may lie ahead, such as sharp turns, pedestrian crossings, or construction zones.

In contrast, blue is generally reserved for informational signs, such as those providing directions or indicating services along the road. Green is used for guide signs that provide information about distances and directions to specific locations. Red is used for stop signs, yield signs, and other prohibitive instructions, indicating that immediate action is required. Thus, each color has its designated use within the traffic signage system to ensure clarity and safety on the road.