What are the visual signs of a driver who may be impaired?

The visual signs of a driver who may be impaired include erratic movements, slow reaction times, and difficulty maintaining lane position. These behaviors often stem from the effects of alcohol or drugs, which can significantly impair a driver's coordination, judgment, and motor skills. Erratic movements might manifest as swerving, abrupt changes in speed, or weaving between lanes, all indicating that a driver is struggling to control their vehicle. Slow reaction times can lead to dangerous delays in responding to traffic signals or hazards, increasing the risk of accidents. Difficulty maintaining lane position can result in drifting out of the lane or failing to stay centered, suggesting a lack of focus and control typically associated with impaired driving. These signs are recognized by law enforcement as critical indicators of a driver's ability to operate a vehicle safely.