People driving under the influence of alcohol are commonly referred to as drunk drivers, or drink-drivers. When charged with this as a crime, it may either be referred to as a DUI (Driving Under the Influence) or a DWI (Driving While Intoxicated), where a DUI is generally considered to be a lesser crime. Studies have been performed to identify commonalities between severe drunk drivers. Laws are also in place to protect citizens from the consequences incurred by drunk drivers.