We need something a little more flexible than rail, a little more rigid than current roads. That said, we need rail more than anything because.
- We know it works and how it works.
- Is a solution we can do tomorrow if we actually wanted to.
- Was a solution till modern cars decided to throw all that out the window.
Self-driving cars on a semi-rigid road system is either going to be the solution that is in the middle for everyone, or something we just completely abandon and we try our best to make modern rail happen.
I'm a big supporter of more rail, but I'm not completely against car-train hybrids. I just would like something better than what we're currently dealing with.