What color(s) are typically used for regulatory signs?

Regulatory signs are designed to inform drivers of laws and regulations to maintain safe and orderly traffic flow. The colors that are typically used for these signs are black and white. Black conveys the regulations clearly and stands out against the white background, ensuring the signs are easily noticeable and legible to drivers. This color scheme is foundational to understanding traffic laws, such as speed limits, stop signs, and yield signs, which are vital for safe driving.

Other color schemes like blue and green are commonly used for informational purposes (such as services and guide signs), while yellow indicates caution, often associated with warning signs. Red and white, on the other hand, are more specifically used for stop and prohibition signs, indicating restrictions or requirements rather than general regulatory information. Thus, the black and white combination is the standard for regulatory signs, making it essential for drivers to recognize and comply with the rules of the road.