In Phase One, what is the primary task of the officer?

In Phase One of the Horizontal Gaze Nystagmus (HGN) assessment, the primary task of the officer is to observe the driver operating the vehicle. This phase is crucial as it helps the officer to identify any potential indicators of impairment while the vehicle is in motion. The officer looks for behaviors such as erratic driving, swerving, or any other signs that may suggest that the driver is under the influence of alcohol or drugs. Gathering this observational evidence is essential for determining whether further investigation or testing is warranted. This initial observation sets the foundation for assessing impairment and guides the officer's subsequent actions.