Driving under the influence (DUI) refers to the crime of driving a motor vehicle while under the influence of alcohol. In the United States, driving under the influence is a criminal offense. It is generally classified as driving a motor vehicle while having a blood-alcohol concentration (BAC) by volume of 0.08% or higher.
Driving under the influence is sometimes also referred to as drunk driving or driving while intoxicated.
Traffic accidents caused by drunk drivers injure several thousand people each year and also cause billions of dollars of property damage. When an individual drives an automobile while under the influence of alcohol and their blood-alcohol concentration (BAC) by volume is above the legally permissible limits, it's considered driving under the Influence (DUI). In most of countries in the world, including the United States, DUI is a criminal offense. Having a blood-alcohol concentration by volume of 0.08% or higher while driving is considered a DUI in the U.S. Some states also put points on driver whose BAC by volume is 0.05% or higher. For commercial drivers in the U.S., the BAC by volume limit is 0.04%.