Cargo inside a trailer: 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 inside a trailer: Answers Does not need to be secured. Should be stacked no taller than three feet high. Should be secured to prevent movement in transit. Should be loaded with the heaviest items on top of lighter items. Explanation Cargo must be properly secured to prevent it from moving in transit. Loose cargo can be dangerous to the driver operating the CMV, as well as to other road users. This questions appears in the following tests: Connecticut Passenger District Of Columbia Class B Knowledge Test Maryland Class A Knowledge Test Maryland Passenger Maryland Passenger Minnesota Class B Knowledge Test Mississippi Class B Knowledge Test