Series-usly though, most driving impaired T/Cs are caused by those with prior DUIs and have repeatedly been arrested and then released via the judicial system.
The average Joe that has three beers before coming home from work is not a significant factor.
Now he has a 'prior'...
DUI is such a cash cow in this county (El Dorado) that no less than 3 agencies (CHP, Sheriff, and local goons) may be popping the CP's on any given week-end night up here.
Maybe it was George Carlin who asked "If drinking and driving is against the law, why do they have parking lots in front of bars??"