Pretty good article; the metric that more fully captures the idea is the ratio of land used for cars instead of people. Narrow streets takes care of the on street parking idiocy, which is the worst of it, but the number of parking structure where there could be residential buildings is also helpful to track. And the six lane highways cutting through the middle of town takes a huge amount of space...
I feel like urbanists should talk about Mexico more. They have really narrow streets, as-of-right construction, and they are much closer than Vienna or Hong Kong.
As someone with a city planning hobbyist interest, I've visited Mexico City and greatly disliked it. It's a miserable city to get around in, though I can see its potential if it ever decides to move away from heavy car infrastructure (some core neighborhoods are pretty nice so long as you don't want to leave them). Were you thinking of somewhere else in Mexico, or specific parts of Mexico City?
