Driving Under Influence (DUI) refers to operating a vehicle while impaired by alcohol or drugs. This impairment can affect a person's ability to make sound judgments, react quickly, and maintain control of the vehicle. Laws regarding DUI vary by location, but generally, a blood alcohol concentration (BAC) of 0.08% or higher is considered illegal for drivers over the age of 21 in many places. Consequences of a DUI can include fines, license suspension, and even jail time. Additionally, a DUI conviction can lead to increased insurance rates and a permanent mark on a person's driving record. Organizations like MADD (Mothers Against Drunk Driving) work to raise awareness about the dangers of impaired driving and promote safer road practices.