Which of the following indicates a potentially impaired driver?

Erratic movements and weaving are significant indicators of a potentially impaired driver. When a driver exhibits unpredictable steering behavior, such as swerving from one lane to another, making wide turns, or failing to maintain a straight path, it typically suggests that their ability to operate the vehicle safely is compromised. Impairment can stem from various factors, including alcohol, drugs, fatigue, or distractions, all of which can affect a driver's coordination, judgment, and reaction time.

In contrast, consistently using turn signals shows a driver who is making an effort to communicate their driving intentions clearly, which is a sign of responsible driving. Maintaining a steady speed and driving within the speed limit further indicate safe driving behaviors, as they demonstrate control over the vehicle and adherence to traffic laws. While these actions reflect competence behind the wheel, erratic movements and weaving distinctly highlight a lack of control, which is a cause for concern regarding the driver's impairment.