What does the color red on a traffic sign indicate?

The color red on a traffic sign indicates a command or prohibition, particularly that drivers must stop. This color is universally recognized as a signal for the most urgent actions needed from drivers to ensure safety on the road. For example, red is used for stop signs and yield signs, which require immediate compliance to prevent accidents and ensure the smooth flow of traffic. Therefore, when you see a red sign, it conveys a sense of urgency and importance in following its directive. Understanding the significance of red in this context helps drivers make quick, informed decisions while navigating roadways.