Driving while intoxicated (DWI) is a charge for individuals who drive while above the legal limit for alcohol. The legal limit is measured by blood alcohol concentration (BAC), which is 0.08 percent for most drivers and 0.04 percent for commercial drivers. Punishments typically involve license suspension, fines, and jail time.
Driving under the influence (DUI) is a crime that occurs when individuals under 21 consume any alcohol and drive. If a driver under the age of 21 has a BAC beyond the legal limit, the individual may also be charged with a DWI.