What do regulatory signs indicate and how are they typically colored?

• A. They provide warning of hazards; yellow.
• B. They indicate mandatory actions; most are red and white.
• C. They indicate directions and distances; blue.
• D. They are optional guidance; green.

Answer: (B)

Regulatory signs tell you what you must do or must not do, enforcing traffic laws that apply to all drivers. They cover actions like Stop, Yield, Do Not Enter, No U-Turn, and other prohibitions or mandatory requirements. They’re designed to be quickly recognizable, and their usual color scheme uses red and white because red signals prohibition or a required action, while white provides high contrast for easy reading at a glance. You’ll see warnings with yellow, directions or distances with blue, and general guidance with green, but those signs communicate different kinds of information.