What are the common signs of driver impairment?

The common signs of driver impairment primarily include observable behaviors and physical indications that suggest a person's ability to operate a vehicle safely is compromised. Slurred speech can indicate a lack of coordination and control over one’s motor functions, which is often associated with alcohol or drug use. Erratic driving, such as swerving, frequent lane changes without signaling, or an inability to maintain a consistent speed, suggests a lack of judgment and awareness of surroundings. Furthermore, an inability to follow traffic signals showcases a disconnect from the basic rules of the road, suggesting that the driver’s cognitive functions are impaired.

These signs are critical for law enforcement and other drivers to recognize, as they can be indicators of potential danger on the road. The other options, like increased attention and focus, excessive use of turn signals, and adherence to speed limits, illustrate responsible driving behaviors that do not typically correlate with impairment. Instead, they represent a driver who is functioning normally and following traffic regulations.