What is the first phase of the DUI detection process?

The first phase of the DUI detection process involves observing the driver's behavior while operating the vehicle. This initial observation is crucial because it allows law enforcement officers to detect potential signs of impairment. Indicators such as erratic driving patterns, swerving, unusual speed, or failure to obey traffic signals can all suggest that the driver may be under the influence of alcohol or drugs.

Understanding this phase is important as it sets the stage for further investigation. Once suspicious behavior is noted, officers can follow up with more direct interactions, like having a conversation with the driver, which helps in assessing their condition further. However, it all begins with keen observation from a distance, which is why this initial step is fundamental in the DUI detection process.