Back in December, the blood alcohol limit was lowered from 80 milligrams to 50 milligrams per millilitre, and while every human is different, that equates to about two standard drinks over two hours before drivers blow the bag. NZTA and Clemenger BBDO announced that change with a simple informational campaign. But, as they have been doing for years, they’re now playing the emotional card. PLUS: How the changes have impacted the booze business.