Unless otherwise posted, what is the maximum gross weight of a vehicle permitted on state highways? 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 Unless otherwise posted, what is the maximum gross weight of a vehicle permitted on state highways? Answers 45,000 pounds 62,000 pounds 81,000 pounds 105,500 pounds Explanation On state highways in North Dakota, the gross weight of a vehicle is limited to a maximum of 105,500 pounds, unless a lower limit is posted.