What are the three main components of the SFST?

The three main components of the Standardized Field Sobriety Test (SFST) are Horizontal Gaze Nystagmus, Walk-and-Turn, and One-Leg Stand. These tests are specifically designed to assess a driver's level of impairment due to alcohol consumption.

Horizontal Gaze Nystagmus involves observing the eyes for involuntary jerking as they follow a moving object, which can indicate impairment. The Walk-and-Turn test gauges a person’s ability to follow instructions and maintain balance while walking heel-to-toe in a straight line. Lastly, the One-Leg Stand test measures balance as the individual must stand on one foot for a specified period. Each of these components provides law enforcement officers with valuable evidence regarding a suspect's sobriety and potential impairment.

Other options do not focus on direct evaluations of a person's driving ability or impairment. Breathalyzer, Field Interview, and Blood Test refer to methods related to alcohol content detection but are not part of the standardized tests used in the field. Similarly, Alcohol Awareness, Substance Detection, and Impairment Assessment are broader concepts rather than specific components of the SFST. Lastly, Driving Simulation, Road Sign Identification, and Vehicle Inspection pertain to general driving skills and safety checks, but none are