A yellow and black diamond-shaped sign: Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question A yellow and black diamond-shaped sign: Answers Warns you about conditions on or near the road. Helps direct you to cities and towns ahead. Tells you about traffic laws and regulations. Tells you about road construction ahead. Explanation Warning signs, which tell you about conditions on or near the road ahead, are usually diamond-shaped with black symbols or words on a yellow background.
