What is the main purpose of conducting SFSTs during a DUI stop?

The primary goal of conducting Standardized Field Sobriety Tests (SFSTs) during a DUI stop is to gather evidence of impairment. SFSTs consist of a series of tests designed to assess a driver's cognitive and physical abilities, which are often affected by alcohol or other drugs. By systematically evaluating a subject's performance on these tests, law enforcement officers can establish whether there is probable cause to believe that the driver is impaired.

This evidence is crucial as it aids the officer in making an informed decision about whether to proceed with an arrest for DUI. The tests are standardized to increase their reliability and validity, ensuring that the results can support legal actions. While the other options mention potential outcomes or considerations within a DUI stop, they do not reflect the fundamental purpose of SFSTs as effectively as gathering evidence of impairment does.