An orange and red triangular sign on a vehicle always means: 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 An orange and red triangular sign on a vehicle always means: Answers Slow-moving vehicle. Shoulder work ahead. The vehicle is broken. Explanation Slow-moving vehicles, such as farm tractors, road maintenance vehicles, and animal-drawn carts, display an orange and red triangle on the back.