What does 'fatigue' signify in terms of psychological factors while driving?

Fatigue in the context of driving has significant implications for a driver's psychological state and overall safety. It particularly signifies a reduction in both reaction time and decision-making ability. When a driver is fatigued, their cognitive functions are compromised; this impacts their ability to respond quickly to sudden changes in traffic conditions or obstacles. It also affects their judgment, leading to poor decision-making such as misjudging distances, speeds, or the appropriateness of maneuvers. The impairment caused by fatigue can be similar to that caused by alcohol consumption, further highlighting the dangers of driving while tired. Recognizing the effects of fatigue is crucial for ensuring road safety and maintaining alertness while driving.