What is the third test administered during DUI SFST?

The third test administered during a DUI Standardized Field Sobriety Test (SFST) is indeed the one leg stand test. This test is designed to evaluate a subject’s balance and motor skills, which can be affected by alcohol or other substances. During the one leg stand, the officer instructs the individual to stand on one leg while the other leg is raised approximately six inches off the ground, holding this position until directed to put their foot down. The officer observes the individual for signs of impairment, such as swaying, using arms for balance, or stepping down.

The one leg stand is considered a critical part of the SFST battery, which also includes the horizontal gaze nystagmus and the walk and turn tests. Each of these tests targets specific indicators of impairment, but the one leg stand particularly focuses on balance, which is a key physical capability that can be compromised by intoxication.