Driving under the influence (DUI) refers to a driver operating a motor vehicle while his driving skills are impaired because of his use of alcohol or other drugs. Most of the focus on this phenomenon has been on the influence of alcohol on someone driving an automobile. More broadly, however, the cause of impairment does not have to be limited to alcohol; the individual does not have to actually be driving, but could be just behind the wheel or in “control” of the vehicle; and the vehicle does not have to be an automobile. A vehicle can refer to just about any type of conveyance, including a bicycle, snowmobile, boat, tractor, airplane, or even a wheelchair. DUI is a crime in most ...