Which statement about DUI and impairment is true?

• A. You can be impaired only if you are over the legal limit.
• B. You can be impaired even if you are below the legal limit.
• C. Impairment is unrelated to alcohol.
• D. DUI only concerns speeding.

Answer: (B)

The main idea is that impairment reflects your actual ability to drive, not just a number on a breath test. You can be impaired even if your BAC is below the legal limit because alcohol and other substances affect judgment, reaction time, coordination, and vision, and individual factors like tolerance, fatigue, or medications can make you sober-behaving less capable behind the wheel. The legal limit is a guideline for enforcement, but it doesn’t guarantee you’re not impaired below that level. So this statement is true because impairment is about how well you can drive, which can be reduced even when you’re under the limit. The other options misstate the relationship between impairment, alcohol, and driving: impairment isn’t defined solely by being over a limit, it isn’t unrelated to alcohol, and DUI isn’t only about speeding.