What is an example of a sign that a driver may be impaired?

Erratic changes in speed are a clear sign that a driver may be impaired. Such behavior can manifest as sudden acceleration or deceleration, often indicating a lack of control or impaired judgment, which may be caused by alcohol, drugs, or fatigue. This inconsistency in speed not only poses a risk to the impaired driver but also to other road users, as it can create unpredictable traffic patterns.

In contrast, consistently using mirrors is a sign of good driving practice that shows a driver is aware of their surroundings. Driving with headlights on is often required, especially in low visibility conditions, and demonstrates responsible driving behavior. Yielding at intersections is part of the rules of the road and indicates that a driver is following traffic laws properly. These actions generally signify attentiveness and adherence to safe driving practices, unlike erratic changes in speed.