Tdurden wrote..

You'll never have the option of even the most advanced driverless car that you own take you home if you're drunk. No way the DUI industry let's go of that kind of power. There is just too much money to be lost. As I've read here and other places, they can, do and will arrest people and convict them for just sleeping while intoxicated in a parked car. Hell, I've heard anecdotes (which I have been unable to verify) of people being arrested for just having keys and accessing the interior of the vehicle while drunk. No way having the real life version of KITT is going to stop cops from making their arrest quota.

They won't lose that power as long as there is a possibility of a person getting any control of the vehicle. I can imagine the authority spew now:
You entered the vehicle is an intoxicated state, you COULD have engaged the manual override in your intoxicated state and driven while intoxicated!!

Hell, it gets even easier for them. Smart car will alert authorities to your impaired state and get instructions to take you too the nearest police for arrest.