The field sobriety test is used by police to establish intoxication.
The One-Leg Stand Test is the third of the standardized field sobriety test used by Texas police. The tests are to establish intoxication for a charge of driving while intoxicated (DWI). So far, the police officer has had you look at his pen while he waved it back and forth in front of your face. […]
Walk and turn is a standardized field sobriety test in Texas. It is used to determine if there is driving while intoxicated.
Field Sobriety Test Horizontal Gaze Nystagmus. DWI testing in Texas