NSC Defensive Driving Practice Test

Alcohol significantly impairs a driver's ability by affecting several crucial aspects needed for safe driving. Firstly, it impairs judgment, which can lead to poor decision-making on the road, such as miscalculating distances, underestimating speeds, or making risky maneuvers. Secondly, alcohol slows reaction times, meaning that a driver's ability to respond quickly to unexpected situations—like a pedestrian suddenly stepping into the road or a car abruptly stopping—is compromised. Finally, coordination, which is essential for operating a vehicle effectively, is also negatively impacted by alcohol. This can affect steering, braking, and even the ability to maintain lane position.

In contrast, the other options are misleading as they suggest benefits or lack of impact on driving skills. Alcohol does not improve vision, especially at night; it typically reduces visual acuity and can cause difficulties with distinguishing colors or seeing moving objects. Moreover, alcohol does not enhance focus or coordination; in fact, it detracts from these essential skills needed for safe driving. Additionally, it is inaccurate to state that alcohol has no effect on driving skills, as research and statistics consistently demonstrate the dangers associated with driving under the influence.