Driving under the 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, increasing the risk of accidents. Laws regarding DUI vary by location, but most places have legal limits for blood alcohol concentration (BAC). If a driver exceeds this limit, they may face penalties such as fines, license suspension, or even jail time. Awareness and education about the dangers of DUI are essential for promoting road safety.