I support this new law because the area of the brain involving judgement doesn't mature until one's early 20s, which is why some teenagers show very poor judgement, especially regarding the consequences of their actions. They're also relatively inexperienced drivers, and should probably be sober at all times when behind the wheel (especially when their obnoxious friends are in the car with them).
But I'm against the 0.00 BAC requirement for all drivers, because I don't think it would actually reduce irresponsible driving, and you can still drive safely after one or two drinks (assuming you're a safe driver to begin with!).
(Any medical professionals out there, please correct me if I'm wrong!)
As I understand it, you can go to dinner, have one drink, and after your body metabolizes the alcohol through the liver, your BAC will drop right back down to 0.00. Your body metabolizes alcohol at a rate of around one drink per hour (give or take) but slows down as your BAC increases, reaching a "tipping point" where your cognitive abilities become substantially reduced.
They've done numerous studies on how alcohol affects the cerebellum (the part of the brain specializing in fine motor movements) and I believe the effect is not cumulative, but multiplicative, because the body can't metabolize it fast enough. So, if one drink has a 2-point impairment factor, each subsequent drink multiplies the level of impairment, rather than adding to it.
Cumulative: 2 + 2 + 2 + 2 = 8
Multiplicative: 2 x 2 x 2 x 2 = 16
So, your impairment between your first and second drink is minor, because your body is still able to metabolize alcohol at a normal rate. But between the third and fourth drink, the effect is actually doubled, because your body's ability to metabolize alcohol decreases as your BAC rises.
(Again, if there are any medical professionals who can verify or refute this, please do - I can't speak for the accuracy of the info, I read this a couple of years ago and can't remember the author of the original study.)
At the end of the day, it all comes down to judgement. I decided to leave my car at the massageplanet party after my second drink; I might still have been
legal, but I was definitely
impaired, so I made my decision accordingly. But on other occasions, I've driven after having three drinks, because I had a large dinner and spent several hours in conversation after we finished eating.
A law is only as good as society's ability to enforce it. How will an officer know that I have a BAC of 0.01? There are no visible or noticeable cognitive effects at this level, and as far as the extensive research has suggested, there are no significant impairments to driving ability until you reach 0.06 - 0.09 BAC. So, why should we restrict the freedoms of people to make sound, safe choices for themselves by passing an unenforceable and unnecessary law?
As far as I'm concerned, MADD is heading towards PETA status in my books - good intentions highlighting important concerns, pushed way too far by zealotry and obsessive single-mindedness.
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