If a vehicle is observed swerving on the road, which phase of OWI detection is taking place?

The correct answer is related to the phase of observation that occurs when a vehicle is actively being driven. In this context, when a vehicle is observed swerving on the road, it falls squarely within the phase where law enforcement is watching the vehicle in motion. This phase focuses on the behaviors exhibited by the driver while operating the vehicle and includes assessing any indications of impairment through the actions of the vehicle itself, such as erratic movement or swerving.

This phase is critical for identifying potential driving under the influence (DUI) situations before any interaction with the driver occurs. It is during this moment that officers gather the initial evidence that may suggest impairment. Other phases, such as pre-arrest screening or personal contact, occur later in the process when the officer engages directly with the driver after stopping the vehicle. Thus, the actions observed while the vehicle is actively traveling are essential for gathering the initial basis for potential further investigation.