What is the purpose of measurements like BAC and BrAC?

The purpose of measurements like Blood Alcohol Concentration (BAC) and Breath Alcohol Concentration (BrAC) is to quantify the amount of alcohol present in a person's system. These measurements provide a numerical value that reflects the proportion of alcohol in a person's blood or breath, which is crucial for assessing the potential effects of alcohol on cognitive and motor functions.

Quantifying the amount of alcohol allows law enforcement and medical professionals to evaluate whether an individual is over the legal limit for driving or if they may pose a risk to themselves or others due to alcohol consumption. This information is pivotal in legal contexts, such as DUI cases, and serves as a standard measure for determining impairment levels. Understanding BAC and BrAC helps enforce regulations designed to maintain public safety on the roads.