In fact to the speed point I've had a dream that working autonomous vehicles would reduce average speed. This improves efficiency and safety across the board.
Don't laugh, it could work... When your car is an extension of your living room or office do you mind slightly longer travel times? Sure you have to leave 10 minutes earlier but you can just pick up your console game in your car.
I assume you included the /s to poke fun at the people who a) want to kick the poors off the roads b) want a bunch of stuff that will have the same net effect but simply haven't yet figured it out.
Yeah, it's just a general current I've noticed running through HN comments where people are so trapped in their bubble they have no idea how life operates for most people outside of it.
* Breathalyzer - I'll give you this one
* Seat Belt interlock - seatbelts save lives just as well in an autonomous vehicle
* Speed - Speed kills passengers and pedestrians just a well in an autonomous vehicle