What color are the warning signs indicating hazards ahead?

Warning signs indicating hazards ahead are colored yellow. This choice is significant because yellow signs are universally recognized as caution indicators, alerting drivers to potential dangers such as sharp curves, pedestrian crossings, or construction zones. The use of bright yellow enhances visibility and helps ensure that drivers can easily identify hazards even in less than ideal lighting conditions. Yellow is specifically chosen to prompt drivers to slow down and be prepared for sudden changes or obstacles on the road, making it an essential part of road safety signage.