Which behavior is a sign of impairment while driving?

A sign of impairment while driving is often indicated by difficulty maintaining lane position. When a driver has impaired judgment and motor skills, they may struggle to stay centered within their lane, leading to swerving, drifting, or inconsistent movement. This can result from various factors, including alcohol or drug consumption, fatigue, or medical conditions that affect coordination and reflexes.

In contrast, using turn signals consistently is indicative of a responsible driving behavior and reflects attentiveness to road rules. Driving at the speed limit also demonstrates adherence to traffic regulations and safe driving practices. Similarly, keeping a steady speed indicates control and awareness on the road, which are behaviors associated with a sober and alert driver. Thus, difficulty in lane maintenance stands out as a clear sign of potential impairment.