Being pulled over on suspicion of driving under the influence can be a stressful and confusing experience. In the moment, many people simply try to follow instructions without fully understanding what is happening.
Field sobriety tests (FSTs) are a series of physical and cognitive tasks used by law enforcement to gauge a driver’s impairment and are commonly utilized during DUI investigations. While these tests play an important role in law enforcement, they are not always as straightforward or reliable as they may first seem.
Potential issues with field sobriety tests
Field sobriety tests are designed to help officers observe signs of impairment. However, these tests can be influenced by many factors that have nothing to do with alcohol consumption. Uneven pavement, weather conditions and physical limitations such as injuries or balance problems can all affect a person’s performance during these roadside exercises.
The officer’s interpretation of the results can also play a role in how the tests are used in a DUI investigation. Field sobriety tests rely heavily on observation and judgment, which means two officers could potentially view the same performance differently. Nervousness during a traffic stop may also make someone appear unsteady or confused, even when they have not consumed alcohol.
Recent reporting has also raised broader questions about DUI investigations in Tennessee. According to information from the Tennessee Bureau of Investigation reported by WTVF in Nashville, nearly 17,000 blood samples were submitted statewide in 2024 following DUI arrests. Of those cases, 419 samples showed no alcohol or other intoxicants in the driver’s system. Situations like this highlight why careful review of the evidence in a DUI case can be important.
A DUI arrest does not automatically mean the evidence against someone is flawless. Speaking with a legal professional who understands DUI laws can help you better understand your options and determine the most appropriate path forward.