What color are most warning signs in Illinois?

Most warning signs in Illinois are yellow because this color is universally recognized as indicative of caution on the road. Yellow warning signs alert drivers to potential hazards or changes in road conditions, such as curves, intersections, or pedestrian crossings. The use of yellow helps to ensure that drivers are aware of situations that might require a reduction in speed or increased attention. In contrast, red is typically reserved for stop signs and yield signs, blue is often used for informational signs regarding services, and green is usually applied to guide signs indicating directions and distance. Understanding these color codes is crucial for safe driving and recognizing the various types of signs encountered on the road.