What endorsement is required if your vehicle is used to carry 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 endorsement is required if your vehicle is used to carry hazardous materials? Answers HazMat Danger Cargo Tank Explanation To drive a vehicle used to transport hazardous materials, you must take a knowledge test to obtain the HazMat endorsement.