The BAC level at which a driver is legally intoxicated is which of the following?

• A. .04%
• B. .08%
• C. .10%
• D. There is no fixed limit

Answer: (B)

Blood alcohol concentration is a measure of how much alcohol is in your bloodstream. In Michigan, the legal limit to drive is 0.08 percent. When your BAC reaches 0.08% or higher, you’re considered legally intoxicated, and authorities can charge you with driving under the influence based on that measurement alone, without needing further proof of impairment. This per se standard reflects evidence that at this level most people experience significant impairment in judgment, reaction time, and coordination. You can still be charged with DUI below that level if there’s clear evidence of impairment. There are stricter limits for certain groups, like drivers under 21 or those with commercial licenses.