In the 1980s and ’90s, a push to lower the legal blood alcohol content (BAC) limit for getting behind the wheel took the country by storm. Mothers Against Drunk Driving (MADD) was formed in 1980, and in 2000, President Bill Clinton signed into law the nationwide .08 BAC limit—conditioning the provision of federal highway funds on state compliance with the new limit. Drunk driving rates are far lower today than several decades ago—falling by around half since the early 1980s, according to the National Institutes of Health. Even so, controversy over the legal limit has found renewed life, with a…