What color are warning signs typically?

Warning signs are typically yellow because this color is universally recognized as an indicator of caution or potential hazards. Yellow warning signs alert drivers to various conditions that may require reduced speed or increased attention, such as curves, intersections, pedestrian crossings, and construction zones. The bright nature of yellow makes it visible in various lighting conditions, ensuring that drivers can notice these critical warnings in time to respond appropriately.

Other colors like red are used primarily for stop signs and prohibitive messages, while green generally indicates directional information or guidance. Blue is often used for informational signs, such as service or traveler information. Therefore, yellow is the appropriate color for warning signs, reinforcing the necessity for caution on the road.