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 or trailers without sides, cargo must be tied down to keep it from shifting or falling off in transit. This questions appears in the following tests: District Of Columbia Class B Knowledge Test Indiana Class B Knowledge Test Massachusetts Class A Knowledge Test Oregon Class A Knowledge Test