DUI or Driving under the influence refers to the act of operating a vehicle after consuming alcohol or other drugs. This drunken driving charge is a criminal offense in most countries.

A person is guilty of DUI if s/he drives or is in actual physical control of a motor vehicle and is under the influence of alcoholic beverages or any chemical or controlled substance to the extent that his/her mental faculties are impaired or when his/her blood alcohol level (BAC) is above the legal limit for the state.

The penalties for being convicted of DUI depend on prior criminal and traffic records, the level of alcohol in blood, and the specific facts of the case at hand. Following a successful conviction for DUI charges, many first time offenders will be required to attend AA meetings or special classes. In some cases, a breathalyzer may be attached to their car’s ignition to prevent the car from starting when they have consumed alcohol. Higher BAC levels can double the penalties under some DUI laws.