it's boring as shit and people are gonna do whatever anyway. including being drunk while driving. Comma.ai works using only cameras and radar so the technology is there. Why are we waiting? People are dying!
There's a really cool thing called a train where you can go places and do whatever you want in the process. If you want to be drunk and fuck around with your phone I recommend taking a train or bus.
How are you going to get drunk people out of cars and onto trains? We've already made it really fucking shit for them. What's your next idea after trains? Prohibition?
HANG UP AND DRIVE!
Don't talk, don't try to do anything other maybe listening to some music while you're driving.