What does it mean if a driver is "driving under the influence"?

"Driving under the influence" refers specifically to the act of operating a vehicle while impaired by alcohol or drugs. This impairment can affect a driver's ability to make sound judgments, react promptly to situations, and maintain control of the vehicle, ultimately increasing the risk of accidents.

Alcohol and drugs can significantly alter a person's mental and physical capabilities, leading to unsafe driving behaviors such as swerving, speeding, or difficulty in following traffic signals. The law typically defines a specific legal blood alcohol concentration (BAC) level that constitutes being "under the influence." This definition centers solely around substances that impair cognitive and motor functions, distinguishing it from other driving situations like fatigue or distractions not related to substance use.

The concept of "driving under the influence" is crucial for maintaining road safety and establishing legal standards for responsible driving practices. It’s a focus of law enforcement efforts to reduce accidents and promote public safety on the roads.