What is the minimum number of clues observed in the Walk-and-Turn test that indicates impairment?

The Walk-and-Turn test is designed to assess a person's physical and cognitive ability to follow instructions while performing a simple walking task. In this standardized field sobriety test, specific clues are identified that indicate potential impairment.

The minimum number of clues that indicate impairment is two. When an officer observes two or more clues, it suggests that the individual may have difficulty maintaining balance, following instructions, or coordinating their body movements—all of which can be affected by alcohol consumption or other substances. These clues provide the officer with a basis to conduct a more thorough evaluation or to make an arrest decision in the case of suspected DUI.

If only one clue is present, that may not provide sufficient evidence of impairment, as it could be attributed to other factors unrelated to alcohol consumption. Observing two or more clues strengthens the officer's case regarding the driver's impairment level.