Which statement is true about permanent warning signs?

• A. Yellow background with black legend.
• B. White background with black legend.
• C. Green background with black legend.
• D. Blue background with black legend.

Answer: (A)

Permanent warning signs are designed to grab attention and warn drivers about hazards ahead. The standard color combination is a yellow background with a black legend. The yellow background signals caution and is highly visible in varying light and weather, while the black lettering provides strong contrast for legibility at speed. This combination is distinct from other sign categories, such as regulatory signs (white background with black legend), guide signs (green with white legend), service signs (blue with white legend), or construction signs (orange with black legend).