The ONLY way to stop DUI is to adopt a European style enforcement program. Driving under the influence of drugs or alcohol is considered as an attempt to kill others.
First Offense, the vehicle you are driving is impounded for 60 days (at YOUR expense and it doesn't matter WHO it belongs to). You go to jail for 30 days, and your drivers license is suspended for 1 year. You must attend regular classes, for several months on drug and alcohol abuse, and you will see a probation officer for at least one year.
Second Offense: You go to jail for 6 months (NO EXCEPTION AND YOU DO THE ENTIRE 6 MONTHS). 5 years probation, with weekly meetings with a probation officer. The vehicle you are driving is impounded for one year at your expense (if it's a rental car, you also pay one years vehicle rental, etc.) No person that lives at your address is allowed to have any vehicle registered at all.. They confiscate the license plates, and if anyone is discovered to be driving a vehicle, they CONFISCATE THE VEHICLE.).
Third Offense: 5 YEARS in prison. ON PAROLE FOR THE REST OF YOUR LIFE. A LIFETIME ban of driving any vehicle. No person that lives at your address is ever allowed to have a vehicle of any type, or a driving license.
Fourth Offense: LIFE IN PRISON FOR ATTEMPTED MURDER, 20 YEARS MINIMUM JAIL TIME.
They take driving under the influence VERY seriously. Nobody would let someone drive their car, if they have even had 1 or 2 drinks. That's where the concept of a designated driver came from. Nobody would loan a car to anyone with a drunk driving conviction, nobody would condone it, it is considered a VERY serious offense. Getting drunk is totally acceptable, but you either have a designated driver, or you call a cab. NO EXCEPTIONS.
And, THEIR BLOOD ALCOHOL LEVELS BEGIN AT .05 AND GO downward in some countries. In the Scandinavian countries, ANY DETECTABLE alcohol at all is considered "driving while impaired".
It's bout time that our society take drunk driving seriously. Anyone that gets behind the wheel while impaired is flat out guilty of attempted murder.