What is the legal BAC limit for driving?
Quick Answer
The legal BAC limit is 0.08% for drivers 21 and older in 49 states. Utah has a lower limit of 0.05%. For commercial drivers, the limit is 0.04%. For drivers under 21, any detectable alcohol is illegal (zero tolerance). You can be charged with impaired driving even below the legal limit.
Explanation
The legal BAC limit is 0.08% for drivers 21 and older in 49 states. Utah has a lower limit of 0.05%. For commercial drivers, the limit is 0.04%. For drivers under 21, any detectable alcohol is illegal (zero tolerance). You can be charged with impaired driving even below the legal limit. Understanding this concept is essential for safe driving and will help you answer similar questions on the DMV written test.
Why This Matters on the DMV Test
Questions about Alcohol & Substances are among the most common on the permit test. Knowing the correct answer helps you pass your exam and stay safe on the road. Most states require a score of 70–83% to pass.
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