And, of course, good judgement and self-control are absolutely necessary for safe driving. As blood alcohol concentration continues to build up, muscle control, vision, and coordination are affected more and more. Eventually, a person will pass out. How Alcohol Affects Driving. All drivers are affected by drinking alcohol.
Alcohol affects judgement, vision, coordination, and reaction time.
Driving too fast or too slow. Driving in the wrong lane. Running over the curb. Quick, jerky starts. Not signaling, failure to use lights.