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The three tests chosen to constitute the "Standardized Field Sobriety Tests" (SFSTs), which have been validated by NHTSA, are: The Horizontal Gaze Nystagmus Test, which involves following an object with the eyes (such as a pen) to determine characteristic eye movement reaction.
An increasingly used field sobriety test involves having the suspect breathe into a small, handheld breath testing device. These are often referred to as PAS Tests, or "Preliminary Alcohol Screening" Tests", or a PBT, "Preliminary Breath Test" and precede the actual arrest and subsequent requirement to submit to an evidentiary chemical test of ...
Field sobriety tests and breathalyzer testing are two ways law enforcement officers often test for sobriety in a suspected high or drunk driver. In the US, these "standardized field sobriety tests" are at the officer's discretion. They can also administer other tests including blood and urine tests. [9]
However, a driver is not legally obligated to submit to field sobriety tests, pre-arrest breath tests or cheek swabs at a DUI checkpoint, according to Shouse California Law Group.
“He was unable to divide attention, he had slowed speech, he was unsteady afoot and he performed poorly on all standardized field sobriety tests,” the filings, obtained by AP said.
Silva testified that he is trained in field sobriety testing. He said during his observations that night he noticed Flint had “bloodshot glassy eyes” with “droopy eyelids.”
Drug impaired drivers still show impairment during the battery of standardized field sobriety tests, but there are additional tests to help detect drug impaired driving. The Drug Evaluation and Classification program is designed to detect a drug impaired driver and classify the categories of drugs present in their system.
He conducted and failed the Standardized Field Sobriety Tests. When the sergeant asked if Balagna thought he should be driving, he said no, according to the report.