Do you currently have car insurance? Insurance is mandatory to drive in California Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question Unless otherwise posted, the speed limit on a non-hard surface county road is: Answers 40 miles per hour. 45 miles per hour. 50 miles per hour. Explanation The speed limit on a county road without a hard surface is ordinarily 50 miles per hour. If another speed limit is posted, follow the posted limit. Take a FREE Practice Test Now This questions appears in the following tests: Nebraska Practice Test