Question When driving, how can you maintain alertness? Answers Keep cool by using the air conditioner or opening a window. Eat a lot of heavy foods. Avoid stopping. Explanation Strategies to avoid becoming fatigued while driving include keeping the cab cool inside by using the air conditioner or opening a window; avoiding heavy foods; and taking rest breaks about every two hours or 100 miles. This questions appears in the following tests: Alaska Class A Knowledge Test Arizona Double Kentucky Double Kentucky Passenger South Dakota Double