What condition affects a driver's ability to drive by slowing down their reaction time?

Fatigue is a significant condition that impairs a driver's ability to operate a vehicle safely, primarily by slowing down their reaction time. When a driver is fatigued, their alertness decreases, leading to slower responses to unexpected situations, such as sudden stops or obstacles in the road. This reduced mental and physical state impairs judgment, coordination, and the ability to process information quickly, which are all critical components of safe driving.

While distracted driving, alcohol consumption, and speeding also negatively affect driving performance, fatigue specifically stands out for its insidious nature; it often accrues gradually over time and can lead to microsleeps or an inability to stay fully aware of the driving environment. Recognizing signs of fatigue and taking necessary breaks or avoiding driving when tired is crucial for maintaining road safety.