What is the walk and turn test, and why does an officer ask for it? It is a roadside field sobriety test used to check whether a person can follow instructions, keep balance, and divide attention between mental and physical tasks. The usual format asks the person to take nine heel-to-toe steps along a straight line, turn in a specific way, and take nine steps back while counting and keeping their arms at their sides. Officers look for clues such as starting too soon, missing heel-to-toe contact, stepping off the line, using arms for balance, or making an improper turn.

In practice, the test is not a direct measure of blood alcohol level. It can be affected by leg or back injuries, age, fatigue, poor footwear, uneven pavement, and weather. In North Carolina, that matters because a roadside stop on slick pavement, black ice, or in dense fog can make even a sober person look unsteady. The test is only one piece of evidence in a DWI investigation.

For a criminal case or an injury claim, the walk and turn test may be used to support probable cause for arrest and can shape how fault and impairment are argued. In North Carolina, implied consent rules under N.C. Gen. Stat. § 20-16.2 and the main DWI law, N.C. Gen. Stat. § 20-138.1, often become part of the larger picture, but the walk and turn test itself is challengeable if conditions or medical issues affected performance.