What is used to warn people about hazardous materials? 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 What is used to warn people about hazardous materials? Answers Placards Flashing lights Color-coded pieces of tape License plate stickers Explanation Diamond-shaped warning signs, called "placards," are placed on the outside of a vehicle carrying hazardous materials to serve as a warning. This questions appears in the following tests: Maryland HazMat Nevada HazMat North Dakota HazMat North Dakota HazMat South Carolina HazMat
