Which signs are yellow and diamond-shaped with black lettering or symbols?

• A. Warning signs
• B. Stop signs
• C. Regulatory signs
• D. Guide signs

Answer: (A)

In road-sign design, color and shape quickly communicate the type of information you’re about to encounter. Yellow, diamond-shaped signs with black lettering or symbols are warning signs. The yellow background signals caution and grabs attention, while the diamond shape flags you that you’re approaching a potential hazard. The black symbol or text then tells you the specific situation to watch for, such as curves ahead, a merging lane, a pedestrian crossing, or construction. This combination helps you notice and respond to changes in the road environment before you reach them. Other sign types look different: stop signs are red and eight-sided, regulatory signs are usually white with black or red text, and guide signs are green with white text.