What behavior could indicate that a driver is impaired when stopped by an officer?

Stopping suddenly and swerving can be strong indicators of impairment in a driver. These behaviors often suggest a lack of control over the vehicle, which is commonly associated with driving under the influence of alcohol or drugs. An impaired driver may struggle to maintain a straight line on the road, leading to sudden movements or swerves. Additionally, abrupt stops may indicate slowed reaction times or difficulty processing stimuli, both of which can result from intoxication or impairment.

On the other hand, driving over the speed limit, while potentially illegal, does not directly indicate impairment. It could stem from a variety of reasons unrelated to intoxication. Using turn signals correctly and maintaining a steady speed typically suggest responsible driving behavior and do not signify impairment. These actions highlight an awareness of road rules and a capacity to operate the vehicle safely, which contrasts sharply with the signs of impairment evident in sudden stopping and swerving behavior.