[rallison]

Both what you say and what the article says is right.

To the article's point, in urban areas, increased density often happens even when mass transit isn't expanded (which then often leads to ever worsening traffic). So, for urban areas that are organically becoming denser, mass transit becomes ever more important, which was partially the article's point in the section you quoted.

Also, to generously read the article, it seems to be making two related points, but not actually imposing a "one should follow the other" ordering that you read into it. The full paragraph:

> Globally, that is nothing notable—in most urban cores a majority of workers take public transportation for work and daily activities. Increasing the density of jobs, hospitals, restaurants, homes, schools, and more is key to the agglomeration effects that make cities such economic powerhouses, and as density grows mass transit becomes essential since it can far surpass the maximum throughput capacity of even the largest roadways.

It is saying two things: 1) high density is critical to be an economic powerhouse and 2) mass transit becomes even more essential as density increases. That paragraph isn't inherently saying mass transit should follow densification (vs preceding densification). Ideally you build out mass transit in anticipation of densification vs playing catch up.

Anyway, to your point, it's absolutely true that building out mass transit is critical in attracting more high-density development (especially very high-density development), and critical in enabling high density development in places that otherwise might not attract that sort of investment.