There's some interesting stuff in here, I'm excited to see what comes of it.
But I'm a bit worried about the thought process in the intro:
> A large network of road tunnels many levels deep would fix congestion in any city, no matter how large it grew (just keep adding levels)
this is untrue in the general case. Notably, if everyone wants to drive to the city center, then there will be congestion, because at one point you must get to the destination.
It's not just volume, but throughput that causes congestion.
When the traffic flow isn't spread out nicely, your traffic can only go as fast as the weakest link.
You know what has higher throughput than cars? trains
But I'm a bit worried about the thought process in the intro:
> A large network of road tunnels many levels deep would fix congestion in any city, no matter how large it grew (just keep adding levels)
this is untrue in the general case. Notably, if everyone wants to drive to the city center, then there will be congestion, because at one point you must get to the destination.
It's not just volume, but throughput that causes congestion.
When the traffic flow isn't spread out nicely, your traffic can only go as fast as the weakest link.
You know what has higher throughput than cars? trains