Which of the following is NOT one of the three standardized tests for OUI?

The breath test is not classified as one of the three standardized field sobriety tests (SFSTs) for operating under the influence (OUI). The three standardized tests recognized by the National Highway Traffic Safety Administration (NHTSA) specifically for assessing a driver’s level of impairment are the horizontal gaze nystagmus, the walk and turn, and the one leg stand tests.

The breath test, while a common method for measuring blood alcohol concentration (BAC), is a chemical test rather than a physical or observational field sobriety test. The breath test provides quantifiable results of a person's blood alcohol level at a specific moment, whereas the standardized tests assess a person's physical and cognitive abilities in relation to their ability to operate a vehicle safely.

Understanding this distinction is crucial for anyone studying OUI regulations, as it helps clarify the processes and tools used in field assessments versus laboratory assessments of intoxication.