Which symptom indicates impairment due to alcohol while driving?

Reduced coordination is a primary symptom indicating impairment due to alcohol when driving. Alcohol consumption negatively affects the central nervous system, which can lead to decreased motor skills and muscle control. This impairment can manifest in various ways, such as difficulty in steering, slowed reaction times, and problems with balance. These effects compromise a driver's ability to safely operate a vehicle, leading to a higher risk of accidents.

In contrast, symptoms such as enhanced reflexes or increased alertness are actually contrary to what alcohol does to the body. Alcohol typically slows down brain function, which hinders the body’s reflexive responses. Additionally, judgment and decision-making capabilities are also severely impaired under the influence of alcohol, rather than improved. Recognizing these symptoms is critical for understanding the dangers associated with drinking and driving, emphasizing the importance of avoiding alcohol before getting behind the wheel.