Random breath testing will work at any level. If it were introduced today at the 0.08 level, it would make a significant reduction in impaired driving deaths. It will work even more effectively at an 0.05 level. Again, both of those measures drive down the number of drinking drivers on the roadways. In effect it also lowers the BAC levels they drive at, and that's where you save lives.
On February 12th, 2008. See this statement in context.