Question When driving: Answers You should always drive at the posted speed limit. You should always drive slightly below the posted speed limit. You should adjust your speed according to conditions. You should drive as fast as possible. Explanation Operators driving too fast is a major cause of fatal crashes. You must continually adjust your speed to a rate that is safe for road and traffic conditions. Take a FREE Practice Test Now This questions appears in the following tests: Mississippi Knowledge Test Class A , North Carolina Knowledge Test Class A , Colorado Knowledge Test Class B ,