Downward-facing triangular signs: 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 Downward-facing triangular signs: Answers Tell riders to yield. Indicate school zones. Indicate construction zones. Indicate railroad crossings. Explanation Downward-facing triangular signs usually indicate that riders should yield. Once the crossroad is clear of traffic, bicycles, or pedestrians and it is safe to do so, riders may proceed through the intersection.