http://www.ncadd.com/08_crashrisk.cfm
This site you cite above states that one is 3-5 times as likely to die in a fatal single driver crash at 0.02.
Why isn't 0.02 an "established by science" limit?
SD
Because there is valid concerns that require a balance to form a comprimise between two opposing sides. Both sides bring proper arguments to the table and a comprimise is the only way forward. .08 is the line I accept that shows most clearly the line of comprimise.
If you are above .08 then you did not have one after work. You had several very very fast or you are just ignoring how much you really had and the impairment you really do have. .08 is where it should be now and where it should stay, IMHO.