Which of the following is NOT an effect of alcohol when operating a vehicle?

When considering the effects of alcohol on a person's ability to operate a vehicle, it is important to understand how it negatively impacts various cognitive and physical functions. Alcohol is known for reducing reaction time, increasing drowsiness, and impairing vision — all of which can significantly compromise driving ability and safety.

Improving coordination would be contrary to the known effects of alcohol. In fact, alcohol typically disrupts coordination, leading to difficulties in maintaining balance and executing precise movements, which are crucial for safe driving. Thus, the assertion that alcohol improves coordination is incorrect when examining the overall impact of alcohol consumption on driving skills and safety. This understanding highlights the dangers of driving under the influence and helps inform better decision-making regarding alcohol consumption before operating a vehicle.