What color is used for warning signs on the road?

Warning signs on the road are universally designed to alert drivers to potential hazards and changes in road conditions. The standard color for warning signs is yellow, as it captures attention quickly and signals caution. Yellow signs indicate that drivers should be aware of various situations, such as curves, pedestrian crossings, or road construction.

In contrast, red is typically reserved for stop signs and other regulatory signs that require immediate attention and action. Blue is used for informative signs, such as those indicating services or travel amenities. Green is primarily employed for directional signs and road guidance. Therefore, yellow’s association with caution and the need for awareness makes it the correct choice for warning signs.