What behavior might indicate a driver is impaired?

Erratic driving behavior is a strong indicator of impairment because it suggests that a driver's motor skills, judgment, and reaction times may be compromised. Such behavior can manifest in various ways, including sudden changes in speed, swerving, tailgating, or unpredictable stopping, all of which are red flags that signal a lack of control often associated with alcohol or drug use. Observing these patterns can alert law enforcement to the possibility that the driver is impaired and may require intervention to prevent a potential accident.

In contrast, frequent lane changes may not necessarily suggest impairment; they could be a result of a driver trying to navigate traffic conditions or look for an appropriate exit. Driving at the posted speed limit and consistent signaling generally indicate responsible driving behavior and do not provide any evidence of impairment. These behaviors do not raise concerns consistent with those associated with intoxication or drug influence.