Michigan Laws against Driving an Automobile under the Influence of Alcohol or Drugs
To help prevent needless automobile injuries and deaths, Michigan has strengthened the laws against drunk driving. In this state, an individual can be convicted of the crime of “driving under the influence” (DUI), if that driver is:
• An adult driving a car with a blood alcohol content of .08 percent or greater.
• A young person (under age 21) driving a car with a blood alcohol content of .02 or greater.
• Anyone operating a large truck or commercial vehicle with a blood alcohol content of .04 or greater.
• Anyone, regardless of age or blood alcohol content, who is unable to safely drive because of the effects of consuming alcohol or controlled substances.

The legal limit for blood alcohol content in Michigan is .08 BAC. Michigan DUI Laws put into effect as of 9/30/03 place the penalties as in the chart below for:
• Operating While Intoxicated (OWI);
• Operating While Visibly Impaired (OWVI);
• Operating Under the Influence of Schedule One Controlled Substances/Cocaine; or
• Allowing a Person to Operate while Intoxicated:
The old Michigan OUIL/UBAC laws for the crime of Operating Under the Influence of Intoxicating Liquor (OUIL) are obsolete and replaced with the new MI OWI laws. The OWVI laws remain, but there is no longer a BAC threshold to prove OWVI.