What is the primary decision in Phase One of a DWI stop?

In Phase One of a DWI stop, the primary decision revolves around whether or not to initiate a traffic stop based on observed behavior or indicators that suggest a driver's impairment. This initial phase is critical as it involves the officer assessing the situation to determine if there is sufficient justification to pull the vehicle over.

Recognizing signs of impaired driving, such as swerving, erratic speed, or delayed reactions, serves as the basis for this decision. If the officer observes potential indicators of impaired driving, the justification to proceed with the stop becomes apparent, allowing them to safely address the situation. This phase is key in law enforcement, as it involves the officer's discretion and judgment based on the observed evidence.

By laying the groundwork for an appropriate safety response, this decision is paramount in ensuring that any subsequent actions taken, such as further assessment of the driver or vehicle, are valid and legally justified. Other options would come into play only after this initial decision is made. For instance, issuing a citation or calling for backup are considerations that emerge later in the process following the decision to stop the vehicle, while searching the vehicle typically occurs if there is probable cause developed post-stop.