Is a person legally intoxicated with 0.400 alcohol level?

Yes, a person is considered legally intoxicated with a blood alcohol content (BAC) of 0.400 or higher in most jurisdictions. In the United States, the legal limit for driving under the influence (DUI) is typically 0.08 BAC, although some states have lower limits. A BAC of 0.400 is five times the legal limit and can cause severe impairment of judgment, coordination, and motor skills, as well as increased risk of accidents and fatalities.