During a DWI stop, what is a sign of clear impairment?

Slurred speech is a sign of clear impairment during a DWI (Driving While Intoxicated) stop because it indicates a potential loss of motor control and cognitive function, which are often affected by alcohol and other substances. Specifically, slurred speech can result from the depressant effects of alcohol on the central nervous system, making it difficult for an individual to pronounce words clearly or form coherent sentences.

This physical manifestation can alert law enforcement officers to the possibility of intoxication, prompting them to conduct further assessments, such as field sobriety tests or a breathalyzer test, to determine the driver's level of impairment. In contrast, calm demeanor, cooperative behavior, and clear vision are generally associated with sobriety and do not serve as indicators of impairment.