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

The phase of OWI (Operating While Intoxicated) detection that is taking place when a vehicle is observed swerving on the road is referred to as "Vehicle in motion." This phase is critical as it represents the initial observations that law enforcement officers make while they monitor how a vehicle is being operated on the roadway.

During the "Vehicle in motion" phase, officers look for specific behaviors that may indicate impairment, such as erratic driving, swerving, sudden braking, or speeding. Observing a vehicle swerving is a direct indicator that the driver may not be in full control, which raises concerns regarding their level of impairment. This initial visual assessment is essential and often establishes the reasonable suspicion needed for further investigation.

In contrast, the other phases focus on different aspects of the OWI detection process. The "Pre-arrest screening" involves assessments conducted after the initial observations, typically including standardized field sobriety tests. "Personal contact" occurs when the officer interacts directly with the driver, such as when they approach the vehicle after it has been stopped. The "Driver assessment" phase includes more detailed evaluations of the driver’s behavior, often involving additional tests and checks to determine their level of impairment. Each of these phases builds upon the observations made