According to the NHTSA (www.nhtsa.gov), the US agency charged with the safety of our nation's highways and byways, the lowering, and it could be argued the establishing, of the legal limit has done little to change the number of traffic deaths in the US related to alcohol consumption, less than one half of one percent.

From the agency's September 2007 report entitled "Motor Vehicle Traffic Crash Fatality Counts and Estimates of People Injured for 2006":

Fatalities at BAC ≥ .08 g/dL Increased slightly (0.1%)
Fatalities at .01 ≥ BAC ≤ .07 g/dL declined slightly (0.4%)

Why continue approaching this in this way I ask?

Peace,
Ed