Using the trailer hand valve while driving: Do you currently have motorcycle 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 Using the trailer hand valve while driving: Answers Will help you turn safely. Will stop your trailer safely. Can cause a skid. Explanation Never use the trailer hand valve while operating your vehicle. Using the trailer hand valve while driving can cause your trailer to skid.