The drunk driving laws in the State of Michigan make it illegal to drive with a .08 percentage blood alcohol concentration (BAC) or above. The .08 limit is the standard measure of the "impaired" driver across the United States. Michigan has lower BAC limits for drivers under the age of 21 and commercial drivers. In addition to Michigan's OWI (Operating While Intoxicated) law, Michigan has another law called the OWVI (Operating While Visibly Impaired). This law means that because drugs or alcohol (or both) are in your body, your ability to drive was visibly impaired.