Flying cars existed as far back as the 1940's. Strange that the most iconic symbol of the future comes from the past. But your absolutely correct in your line of thought. Flying cars do exist. However they are too expensive and too dangerous for the typical drivers. Basically until the tech existed not only to make them cheap enough but also idiot proof they won't reach the public in mass. 

Tony Stark once said that "sometimes you gotta run before you walk"

Very true. Take off and landing is the most difficult technical portion plus when a vehicle is near the most things to run in to.

The reason we don't have flying cars is cuz most people on our roads these days can barely drive a normal car properly.

Excellent point.

Google made a driverless car.

I agree with everything he said

I have seen how poorly people handle automobiles on the ground and I most certainly don't want those people flying over my house. Until you remove the human factor from flying or driving, you are going to continue to have incredibly stupid people running into others and objects and killing themselves and others. I think the basic idea is correct, I just don't think that humans can be any part of the control chain in flying cars. I also know that millions of people will never surrender control no matter what. Just look at the number of people who insist on a manual transmission because they refuse to even allow the machine to shift gears for them. 

You bring up a very good point, "politeness" and road design are types of automation. If the roads keep you away from situations where you might hit another car or person at a high difference of speed that will reduce deaths and injuries.

Read the description.

Thanks. Great point about the two merging together.

Exactly.