In addition to alcohol, which other factor can impair driving ability?

Fatigue is a significant factor that can impair driving ability, as it can affect a driver's reaction times, attention, decision-making skills, and overall alertness. When a person is fatigued, they may fall into "microsleeps," which are brief episodes of sleep that can occur without the individual being aware of it. This can lead to dangerous situations on the road.

Medications can also impair a driver's ability, depending on their effects. Certain medications may cause drowsiness, reduced coordination, or other cognitive impairments that can make driving risky. Combining the effects of fatigue and medication can significantly increase the likelihood of an accident, similar to the impairment caused by alcohol.

While extreme weather conditions can create hazardous driving conditions, such as reduced visibility or slippery roads, which could potentially lead to accidents, the fundamental impairment of cognitive function and the inability to react appropriately are more directly associated with fatigue and medication. Noise levels might distract a driver, but they do not impair driving abilities in the same critical way that fatigue and medication do. Therefore, the choice that includes both fatigue and medication highlights the two factors that most directly impact a driver's capability to operate a vehicle safely.