Utopian Urbanism: a city with multiple grades of travel

In this post, I will reconcile the tension between the fact that method of travel informs an urban space, and the fact that so many methods of travel are the result of historical happenstance.

I will propose a method of urban transportation that's heavily modular, so the modes of travel develop in line with technology. That way, there can be several grades or planes, that all have different modes of transportation, and they can be replaced by different modes easily, if needed.