[central_va]

Another problem is that rob cars will feedback themselves into gridlock trying to maintain separation.

[socialism_stinX]

Good point, and another really tough technical challenge is passing slow vehicles on 2-lane highways. That’s a challenge even for humans with good eyesight. I wonder if some of these venture capital people have actually driven a motor vehicles on a 2-lane highway in the country in the last 10 years.
;-)

[bigmak007]

Then I envision bipedal robot carriers that can transverse any terrain.....

[SamAdams76]

Actually you have it backwards. It is human drivers that cause gridlock due to drivers acting in their own selfish interest, constantly jockeying for advantage. With adequate spacing, constant speeds can be maintained, which allow much more volume on our highways.