When driving a tank with liquid cargo, a surge: 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 When driving a tank with liquid cargo, a surge: Answers Is usually helpful. Can be dangerous. Should not be a concern. Explanation Tank vehicles carrying liquid cargo are vulnerable to surge. Liquid surge is an occurrence in which a wave of liquid sloshes from one end or side of a tank to the other, causing dangerous effects on handling.