Cargo on flatbed trailers should be: 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 Cargo on flatbed trailers should be: Answers Tied down. Glued down. Left loose. Pushed to one side. Explanation On flatbed trailers and trailers without sides, cargo must be securely tied down to keep it from shifting or falling off in transit. This questions appears in the following tests: New Jersey Class A Knowledge Test West Virginia Class B Knowledge Test