What is the legal blood alcohol content (BAC) limit for drivers over 21 in Massachusetts?
In Massachusetts, the legal BAC limit for drivers over the age of 21 is 0.08%. Exceeding this limit can result in a charge of driving under the influence (DUI). This legal threshold is established to minimize alcohol-impaired driving and to enhance road safety for all users.
See the exact questions that will be on the 2026 Massachusetts DMV exam.
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