Recognizing the signs of driver fatigue can save your life if you act responsibly and avoid driving while sleep deprived. You should stop driving and either get some rest before resuming, or allow a passenger to take over at the wheel if you experience any of the following symptoms:nPeriods of nodding off at the wheel, also called microsleep. Instances of microsleep may be short, only a few seconds or so, but nodding off for any amount of time is dangerous.nDifficulty keeping your eyes open. If your eyelids become heavy, blurring your vision, and if your blinking increases, these are the first signs of drowsiness.nDifficulty maintaining speed. The body begins to relax the more fatigued you are, causing your foot to ease up on the gas pedal, slowing your speed.