The National Transportation Safety Board has voted to urge the states drop the blood alcohol level necessary for a driving while intoxicated violation from .08 to .05. This means two to three drinks in an hour for a 180-pound man, versus about four.
The change would save lives, the NTSB believes.
It will be hard to persuade the states to adopt the change.
You might find this list of worldwide BACs interesting. A few countries have zero tolerance