Smoking beer and drinking pot are the same ?? Scratch that, reverse it.
Drink 5 beers and drive? That's DUI.
Smoke 5 joints.....drive?
Same thing - in Georgia, the charge is DUI which includes all drugs including alcohol, pot, other illegal drugs and prescription drugs.
Georgia even has Driving While Distracted as a charge - talking on phone, texting, eating, talking to passengers, etc.