What does the walk and turn test primarily evaluate?

The walk and turn test is primarily designed to assess a driver's balance and coordination. This standardized field sobriety test requires the individual to perform a series of physical tasks, such as walking heel-to-toe in a straight line and then turning around to walk back. The ability to maintain balance while performing these tasks reflects the person's motor skills, which can be impaired due to alcohol or drug use.

Evaluating balance and coordination is crucial because these skills are essential for safe driving. When a driver's cognitive and physical abilities are compromised, it can significantly increase the risk of accidents. Therefore, the primary goal of the walk and turn test is to determine whether a person's coordination and balance are functioning properly, which directly impacts their capability to drive safely.