What are the 3 Standardized Field Sobriety Tests?
During a field sobriety test, there is no pass or fail. Instead, an officer should observe for clues that may indicate alcohol impairment. There are only three validated tests by the NHTSA which are the horizontal gaze nystagmus test, the walk-and-turn test, and the one-leg-stand test.
How many clues are in field sobriety tests?
The officer checks for three clues in each eye, which gives six clues for this test. The clues are: lack of smooth pursuit of the eyes, distinct and sustained nystagmus at the eyes’ maximum deviation and nystagmus starting before the eyes reach 45 degrees.
How many clues does it take to fail one leg stand?
While performing this test, the officer will look for six possible clues: swaying, using arms for balance, hopping or putting your foot down. If the officer observes two or more clues, you will fail the test and can be arrested for drunk driving.
What is a DRI test?
The Driver Risk Inventory (DRI) is a brief, easily administered and automated (computer scored and interpreted) test that is specifically designed for use with OWl (Driving While Intoxicated) and DUI (Driving Under the Influence) offenders.
What are cops looking for with the pen test?
The HGN test involves the police officer having the driver follow a pen with his eyes. The police officer is looking for specific responses from the eyes that show the driver is under the influence. Nystagmus is the involuntary rapid movement of an eye either horizontally or vertically.
At what BAC does nystagmus start?
Onset of Nystagmus Prior To 45 Degrees The point at which the eye is first seen jerking. If the jerking begins prior to 45 degrees it is evident that the person has a BAC above 0.08, as shown by recent research. The higher the degree of impairment, the sooner the nystagmus will be observable.
What does PBT stand for alcohol?
preliminary breath test
The effectiveness of the preliminary breath test (PBT) in aiding the enforcement of driving-while-intoxicated (DWI) laws is examined. The PBT is an objective roadside blood alcohol content (BAC) chemical test.
How many clues does it take to fail a walk and turn?
THE WALK AND TURN FIELD SOBRIETY TEST It has two stages: the instruction stage and the walking stage. During both stages, the officer is looking for specific “clues” of intoxication. If the officer believes he sees two or more clues, at any time during the test, you will fail the test and be arrested for DWI.
How many clues are in the one leg stand?
four possible
In the One Leg Stand test there are four possible clues of impairment. If the suspect exhibits two clues then the test results indicate that the person is impaired.