Fatigue

Driver fatigue is one of the biggest killers on NSW roads. Fatigue does not only relate to extreme exhaustion but includes everyday mental or physical tiredness that affects your ability to function—even brief lapses in concentration can have serious consequences.
Being tired can affect your driving by reducing concentration and alertness to dangers as well as slowing your reaction times. It can also cause a microsleep—where you briefly fall asleep unintentionally. If this happens while driving, it can cost you your life.