For those of you who are part of the Ride Share community and who drive for companies like Uber and Lyft, there is a new DUI law in effect TODAY. You cannot drive if you have a BAC (blood alcohol concentration level) of .04 or more, or your risk arrest and prosecution for DUI in California. Depending on what you are drinking and whether or not you have consumed food, along with body mass, this could mean a single large alcoholic drink makes you DUI if you drive shortly after consuming. Two drinks definitely places you at risk for arrest.