For you perhaps?
The problem is most car owners see driving (on city, state and federally funded roads) as a right and not a privilege.
Although definitely there should be a margin for error. Which is why, I think a car Breathalyzers or ignition interlock systems in every car is a great idea. Then we won't have to guess about our current level of intoxication or sobriety (using Breath Alcohol Concentration) before starting our cars. Eventually other tech will come along to identify more than just alcohol intoxication.
Waiting a few minutes/hours (to drive your car) literally won't kill you.
http://www.smartstartinc.com/