What is the legal blood alcohol concentration (BAC) limit for drivers over 21 in Montana?
The legal blood alcohol concentration (BAC) limit for drivers over 21 in Montana is 0.08%. Exceeding this limit classifies a driver as legally intoxicated, significantly impairing their ability to drive safely. Drivers who exceed this BAC limit are subject to legal consequences, emphasizing the importance of not drinking and driving.
See the exact questions that will be on the 2026 Montana DMV exam.
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