What is the legal BAC limit for driving?

• A. 0.10
• B. 0.05
• C. 0.00
• D. 0.08

Answer: (B)

Legal limits on BAC establish how much alcohol you can have in your blood while driving. For most adult drivers, the limit is 0.05%. This means driving with a BAC of 0.05% or higher is illegal in many places, and penalties apply if you exceed it. Even small amounts of alcohol can impair skills essential for safe driving, like reaction time, judgment, and coordination, so the law uses a threshold to protect road safety. The other numbers either represent higher limits, which still permit impairment, or a zero-tolerance level that applies only to certain groups (for example learners or new drivers) in some areas. Since laws vary, it's important to know the local limit, but the commonly cited limit for many jurisdictions is 0.05%.