Illinois Driving Permit Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

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What is the legal blood alcohol concentration limit for drivers over 21 in Illinois?

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0.08%

In Illinois, the legal blood alcohol concentration (BAC) limit for drivers over the age of 21 is set at 0.08%. This standard is widely recognized across many states in the U.S. as a threshold for determining whether a driver is legally impaired. A BAC of 0.08% indicates that an individual's blood has 0.08 grams of alcohol per deciliter, which is sufficient to impair their ability to operate a vehicle safely, affecting reaction times, judgment, and overall coordination. Maintaining this legal limit is crucial in promoting road safety and reducing alcohol-related accidents.

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0.10%

0.12%

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