What is the legal blood alcohol concentration (BAC) limit for drivers over the age of 21?

The legal blood alcohol concentration (BAC) limit for drivers over the age of 21 is set at 0.08%. This threshold is established to maintain road safety and is based on extensive research indicating that impairment begins to significantly affect driving abilities at this level of alcohol consumption. At or above this limit, drivers are considered legally intoxicated, which means they may face legal penalties if caught driving. Understanding this limit is crucial for drivers, as it helps them make informed decisions about alcohol consumption in relation to their ability to operate a vehicle safely. This standard reflects a consensus in traffic safety laws aimed at reducing accidents related to alcohol impairment.