Drivers under the influence of alcohol may be detected by observing which behavior?

Drivers under the influence of alcohol often exhibit noticeable physical signs that indicate impaired judgment and coordination. One common behavior observed is weaving between lanes. This erratic driving pattern results from the impaired driver struggling to maintain proper control over their vehicle, leading to difficulty staying centered in their lane. Alcohol affects motor skills and reaction times, which contributes to such behaviors, making weaving a significant indicator of impairment.

In contrast, driving at consistent speed or maintaining a straight path typically indicates better control and awareness of driving conditions, qualities often compromised by alcohol. The use of turn signals is also generally a sign of responsible driving but does not directly indicate impairment. Therefore, weaving from lane to lane is a clear symptom of the impaired ability to drive safely, highlighting the potential dangers posed by alcohol consumption while driving.