What does the color yellow usually indicate on road signs?

The color yellow on road signs is universally recognized as a warning signal. It indicates potential hazards or unexpected situations that drivers should be aware of ahead. This includes information about things like curves in the road, pedestrian crossings, and other safety alerts that could affect vehicle operation.

Yellow serves as a cautionary indicator, prompting drivers to be vigilant and prepared for anything that may require their attention or alter their driving behavior. This is crucial for maintaining safety on the roads, as the visibility of yellow signage helps to catch a driver's eye and conveys the need to proceed with caution.

In contrast, regulatory instructions are typically communicated through red or white signs, services are often indicated with blue or green, and recreational areas might use brown signs. Each of these colors has a specific meaning that differs distinctly from the warnings conveyed by yellow signs.