Driving while intoxicated (DWI), operating a vehicle under the influence (OVI), or driving under the influence (DUI) are all ways to describe the same thing: intoxicated driving. Intoxication may be the result of alcohol or another chemical substance (e.g., marijuana) or both. To be a criminal offense in Wayne County, your blood alcohol content must be at or above the legal limit, you have an illegal chemical substance in your system, or your driving abilities were otherwise impaired.