And while we're at it, 0.08% BAC is pretty damn low. Most people at 0.08% will show almost no signs of being drunk. We've worked our way down to 0.08% as a legal limit due to the efforts of groups like MADD and a general intolerance of ANY level of impairment due to alcohol. If I knew the driver next to me was at 0.09% BAC I wouldn't be too concerned unless they were also driving like a jack-***. I'm guessing 0.05% is the threshold when a person starts to feel any effects of alcohol at all and reaction time starts to slip. Keep in mind that different people have different reaction times going in, so a person legally drunk at 0.081% might very well still have reaction times better than your average driver, albeit lower than their normal reaction time.
Let's keep in mind that when we're talking about the lower end of the legal limit we're talking about very minor levels of impairment.
Let's keep in mind that when we're talking about the lower end of the legal limit we're talking about very minor levels of impairment.