Even one drink is to much according to a study by the University of California San Diego that looked at crash data from 1994 to 2011 involving over 570,000 collisions. The study found that drivers who had a Blood Alcohol Content as low as 0.01 percent were 46 times more likely to be blamed in a crash. Read more: http://www.sciencedaily.com/releases/2014/01/140116084842.htm