Railroad advanced warning signs are which color and shape?

• A. Red and triangular
• B. Yellow and round
• C. Green and square
• D. Black and circular

Answer: (B)

Railroad advance warning signs use a yellow background and a round shape to clearly signal a railroad crossing is ahead. The yellow color alerts you to exercise caution, and the circular sign is the standard warning indicator for railroad-related hazards. When you see this sign, slow down, look and listen for approaching trains, and be prepared to stop if needed. The other color and shape options don’t match the established railroad warning convention: red and triangular isn’t used for this purpose, green and square is for directions or permitted movements, and black with a circular outline wouldn’t align with the typical yellow circular warning sign.