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

In Illinois, the legal blood alcohol concentration (BAC) limit for drivers who are over 21 years old is established at 0.08%. This means that if a driver's BAC measures 0.08% or higher, they are considered legally intoxicated, and can be subject to arrest for driving under the influence. The rationale behind this limit is rooted in research indicating that impairment begins to occur at lower BAC levels. Maintaining this standard promotes road safety, helping to prevent accidents related to impaired driving.

While the other options reflect other BAC levels, they do not represent the current legal threshold established by Illinois law for general drivers over the age of 21. Understanding this limit is crucial for responsible driving and adherence to state regulations.