The key to making transit useful for people is not very complicated. It is highly dependent on population densities. In other words, it works best when it's proximate to as many people as possible. And so the more low density a city is, the harder it is for this to be true. It just isn't feasible to run that many lines. To that end, here's an interesting study by the School of Cities at the University of Toronto that compares rail transit and population density for 250 cities around the world.
This is what Toronto vs. Hong Kong looks like:
I chose Hong Kong because, according to this dataset, it has the highest percentage of people living within 1 km of a major rail transit station at 75.8%. Toronto, on the other hand, sits at 20%, which is frankly not very good (though I don't see our slow-moving streetcars on the above map). It's also why our bus network has to do so much heavy lifting to get people to rail. This places us 8th in the US and Canada (see below). Once again, when it comes to transit in this part of the world, there's New York, and then everyone else:
But add in the rest of the world -- most notably Europe and East Asia -- and New York drops down to 17th position:
This, to me, is a critically important metric. For what share of residents is rail transit close and convenient? In cities like Hong Kong, Paris, and Stockholm, it is the majority of the urban population. But for the majority of cities in Canada and the US, the answer is a very small percentage. To improve this, you can obviously build more lines. And that's certainly part of it. But to really maximize the value of these investments, you also need density. I hope our city leaders are paying attention to this metric.
