As of now, the legal permit of blood alcohol in your system is 0.08%. Scientists say lowering the level can discourage drunk driving and prevent fatalities.

In Washington, a BAC over 0.08% is considered to be driving under the influence. The average drunk driver involved in a fatality had BACs at least two times the legal limit, Hansen noted. "These drivers are the most costly. In terms of fatality risk, a person with a BAC of 0.15 is about 20-30 times more dangerous than a person who is sober," Hansen pointed out.
Lowering the BAC threshold, he wrote in the study, might make drivers "internalize the external costs of drunk driving."
The findings appeared in American Economic Review.
Source-IANS