
The following diagrams were taken from LSE’s Urban Age website. I’ve sorted them from lowest to highest peak residential population density. In each case I’ve also included the year of the dataset.

The following diagrams were taken from LSE’s Urban Age website. I’ve sorted them from lowest to highest peak residential population density. In each case I’ve also included the year of the dataset.

The following diagrams were taken from LSE’s Urban Age website. I’ve sorted them from lowest to highest peak residential population density. In each case I’ve also included the year of the dataset.
It’s amazing how much these simple extrusion diagrams can tell you about the city. It also shows you that high population densities don’t necessarily need to equate to tall buildings. Barcelona, in particular, stands out for me.
Berlin (Peak residential density: 21,700 people/km2, 2009)

Stockholm (Peak residential density: 24,900 people/km2, 2012)

London (Peak residential density: 27,100 people/km2, 2013)

São Paulo (Peak residential density: 29,380 people/km2, 2009)

Mexico City (Peak residential density: 48,300 people/km2, 2009)

Barcelona (Peak residential density: 56,800 people/km2, 2013)

New York (Peak residential density: 59,150 people/km2, 2012)

Shanghai (Peak residential density: 74,370 people/km2, 2011)

Istanbul (Peak residential density: 77,300 people/km2, 2013)

Hong Kong (Peak residential density: 111,100 people/km2, 2013)

Mumbai (Peak residential density: 121,300 people/km2, 2013)

One of the reasons I’m so fascinated by cities is that it’s becoming increasingly more important to get them right. From about 1831 to 1925, London was the largest city in the world. Its population went from somewhere around 1.5 to 2 million people to nearly 7.5 million. London surpassed Beijing as the largest city and was then surpassed by New York.
Today our largest cities are significantly bigger. Tokyo has almost 40 million people and London doesn’t even make the top 10. But there’s also a broader shift taking place. According to a new report by the United Nations, most of the world’s largest cities will be in Africa and Asia by 2030. Here’s a chart from Quartz:
And the reason for this shift is because Asia and Africa are newly urbanizing, whereas the rest of the world has already urbanized. In North America, over 80% of people already live in cities.
But even though Asia and Africa are following a trend that has already taken place in the rest of the world, it doesn’t mean we should assume we know what we’re doing. Having spent time in cities like Dhaka, I can attest to the many challenges that these mega-cities are facing and will continue to face as people flood in from the rural areas looking for economic opportunities.
So while it’s important that we talk about strategies for reviving cities like Detroit – which has a population somewhere around 700,000 - 800,000 people – we should also keep in mind that we have some significant challenges ahead of us in terms of creating a sustainable urban planning agenda for the world.
I care a lot about transit.
I fundamentally believe that it needs to be the backbone of any well functioning and thriving metropolis. As the global economy continues to become an increasingly more urban one, we are seeing the rise of cities at a scale the world has never seen before.
Tokyo is over 37 million people. Jakarta is almost 27 million. Seoul is almost 23 million. And the list goes on. With cities of this size, do we really think it’s reasonable for everybody to be driving around in cars? It ain’t going to work.
Here’s an image from the Guardian, with the title, “Imagine if Paris had as many new cars as Mumbai”:
Now, by global standards, Toronto is a relatively small city, at just over 6 million people in the region.
But that doesn’t mean we don’t have challenges. In my view, the single biggest threat facing Toronto’s long term economic competitiveness is our severe infrastructure deficit. It’s impacting productivity levels, social cohesion, the environment, our global brand and many other things.
Because of this belief, I’ve become interested in the work of CivicAction. It’s a group of non-partisan civic leaders who care about the future of our city. They have 3 areas of focus:
Accelerating regional transportation
Enhancing the region’s economic performance
Fostering inclusion and resilience
They’ve just launched a pledge that allows Torontonians to make their voice heard to elected officials. I just pledged to support new ways to raise funds for a better transportation network, and I would encourage you to do the same if you care about the future of our city. I know I certainly do.
At the time of writing this post, 2,821 members of the general public and 126 elected officials had pledged.
It’s amazing how much these simple extrusion diagrams can tell you about the city. It also shows you that high population densities don’t necessarily need to equate to tall buildings. Barcelona, in particular, stands out for me.
Berlin (Peak residential density: 21,700 people/km2, 2009)

Stockholm (Peak residential density: 24,900 people/km2, 2012)

London (Peak residential density: 27,100 people/km2, 2013)

São Paulo (Peak residential density: 29,380 people/km2, 2009)

Mexico City (Peak residential density: 48,300 people/km2, 2009)

Barcelona (Peak residential density: 56,800 people/km2, 2013)

New York (Peak residential density: 59,150 people/km2, 2012)

Shanghai (Peak residential density: 74,370 people/km2, 2011)

Istanbul (Peak residential density: 77,300 people/km2, 2013)

Hong Kong (Peak residential density: 111,100 people/km2, 2013)

Mumbai (Peak residential density: 121,300 people/km2, 2013)

One of the reasons I’m so fascinated by cities is that it’s becoming increasingly more important to get them right. From about 1831 to 1925, London was the largest city in the world. Its population went from somewhere around 1.5 to 2 million people to nearly 7.5 million. London surpassed Beijing as the largest city and was then surpassed by New York.
Today our largest cities are significantly bigger. Tokyo has almost 40 million people and London doesn’t even make the top 10. But there’s also a broader shift taking place. According to a new report by the United Nations, most of the world’s largest cities will be in Africa and Asia by 2030. Here’s a chart from Quartz:
And the reason for this shift is because Asia and Africa are newly urbanizing, whereas the rest of the world has already urbanized. In North America, over 80% of people already live in cities.
But even though Asia and Africa are following a trend that has already taken place in the rest of the world, it doesn’t mean we should assume we know what we’re doing. Having spent time in cities like Dhaka, I can attest to the many challenges that these mega-cities are facing and will continue to face as people flood in from the rural areas looking for economic opportunities.
So while it’s important that we talk about strategies for reviving cities like Detroit – which has a population somewhere around 700,000 - 800,000 people – we should also keep in mind that we have some significant challenges ahead of us in terms of creating a sustainable urban planning agenda for the world.
I care a lot about transit.
I fundamentally believe that it needs to be the backbone of any well functioning and thriving metropolis. As the global economy continues to become an increasingly more urban one, we are seeing the rise of cities at a scale the world has never seen before.
Tokyo is over 37 million people. Jakarta is almost 27 million. Seoul is almost 23 million. And the list goes on. With cities of this size, do we really think it’s reasonable for everybody to be driving around in cars? It ain’t going to work.
Here’s an image from the Guardian, with the title, “Imagine if Paris had as many new cars as Mumbai”:
Now, by global standards, Toronto is a relatively small city, at just over 6 million people in the region.
But that doesn’t mean we don’t have challenges. In my view, the single biggest threat facing Toronto’s long term economic competitiveness is our severe infrastructure deficit. It’s impacting productivity levels, social cohesion, the environment, our global brand and many other things.
Because of this belief, I’ve become interested in the work of CivicAction. It’s a group of non-partisan civic leaders who care about the future of our city. They have 3 areas of focus:
Accelerating regional transportation
Enhancing the region’s economic performance
Fostering inclusion and resilience
They’ve just launched a pledge that allows Torontonians to make their voice heard to elected officials. I just pledged to support new ways to raise funds for a better transportation network, and I would encourage you to do the same if you care about the future of our city. I know I certainly do.
At the time of writing this post, 2,821 members of the general public and 126 elected officials had pledged.
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