What is an example of a field sobriety test?

Walking a straight line is an example of a field sobriety test designed to assess a driver's coordination, balance, and ability to follow instructions. This test is commonly used by law enforcement during DUI stops. The procedure requires the individual to walk in a straight line, typically heel-to-toe, and then turn around and walk back. Observations made during this test include the person’s ability to maintain balance and their focus while performing the task.

Field sobriety tests aim to provide a quick, on-site evaluation of potential impairment due to alcohol or drugs. They are typically conducted before more invasive tests, such as breath or blood tests, which measure blood alcohol content. The other tests listed, while related to assessing impairment, are not categorized as field sobriety tests. A breathalyzer measures the alcohol in a person’s breath, a blood test examines alcohol levels in the bloodstream, and a vision test assesses eyesight rather than coordination or balance.