Couple of points:
100 other countries using .05 doesn't mean much to me, 100 other countries also have very restrictive gun laws. Lets stick to what is salient, is .05 a level where driving is impaired. I don't think so...
I don't think .08 impairs driving much.
I'll agree that "drunk" driving is a problem, but there is a difference between being .23 five hours after drinking, and .081 twenty minutes after drinking.
If the penalties for impaired driving are going to be as tough as they are, seems fair that the limit ought not to be, "maybe impaired a little". I guess there could be different penalties for different BACs, might work better.
Texting on cell phones is really impaired, I'd say well over .08 BAC worth of impairment.
