What is the legal blood alcohol concentration (BAC) limit for drivers over 21 in Tennessee?

In Tennessee, the legal blood alcohol concentration (BAC) limit for drivers aged 21 and over is set at 0.08%. This means that if a driver's BAC reaches this level or higher, they can be charged with driving under the influence (DUI), regardless of whether their driving ability is impaired. The BAC limit is established based on substantial research demonstrating that impairment increases significantly at this concentration, impacting judgment, coordination, and reaction times, thus increasing the risk of accidents. This legal threshold aims to create a clear standard for law enforcement and enhance road safety by discouraging drinking and driving behavior.