What type of tests are designed to evaluate if an operator is intoxicated or impaired?

Standardized Field Sobriety Tests (SFSTs) are specifically designed to assess whether a driver is intoxicated or impaired. These tests consist of a series of exercises that measure a person's physical and mental abilities, which can be affected by alcohol or drugs. The three commonly recognized tests in the SFST battery are the Horizontal Gaze Nystagmus, Walk and Turn, and One Leg Stand. These tests are standardized, meaning they are conducted in a consistent manner to ensure that results can be reliably interpreted by law enforcement officers.

The use of SFSTs allows law enforcement officers to gather objective evidence regarding a suspect's level of impairment at the roadside, making them a critical tool in DWI enforcement. They are specifically designed to be administered in a non-invasive and efficient way, fitting within the quick assessment required during a traffic stop.