Hong Kong is one of the last cities in the world that still uses bamboo scaffolding for construction. Why? Well, for one thing, it grows very tall, and quickly (source):
Bamboo is one of the fastest-growing plants in the world, and in some cases can grow 60cm a day, and eventually 40 metres tall. Bamboo has thick underground roots called rhizomes, which can grow quickly, creating new shoots metres away.
And it's cell-like structure performs very well under compression:
Compared to steel, bamboo is much lighter, six times faster to erect and 12 times faster to dismantle. It’s also a fraction of the cost. Bamboo scaffolding doesn’t require sophisticated machinery or complex tools to erect, just skilled workers with nylon ties. If properly erected, bamboo scaffolding can be stronger than steel and far more flexible. The resulting structure is also easy to modify, if necessary. Bamboo scaffolding can be used for entire structures, or part of them. In Hong Kong it is common to see “bamboo balconies” jutting from the sides of buildings where renovations are being carried out on individual units, many floors up. A bamboo pole can also be cut to fit an awkward space, which is ideal for Hong Kong, where construction spaces can be tight amid the densely packed maze of buildings.
But it's unclear how long this will remain true. Young people aren't learning the trade at the same rate as previous generations. And today, there are only 2,479 registered bamboo scaffolders left in Hong Kong. Assuming you have the nerves, the hardest part of the job is apparently the knot. It can take years to master.
If you're interested in this topic, I recommend you read this article. I found it fascinating.
Images: South China Morning Post
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.
There are countless rankings of cities out there. And most of them probably don't mean very much. But the concept of a "global city", as coined by Saskia Sassen in the early 90s, is still immensely fascinating to me. And that's because there is, in fact, an order. There are cities that are less and more important to the global economy.
To this end, Resonance Consulting has just released their annual ranking of the world's best cities. And this year, they've introduced something new to their methodology: perception data. For this, they partnered with Ipsos and asked more than 22,000 respondents across 30 countries the following three broad and open-ended questions:
What are the top 3 towns or cities you would most like to live in someday?
What are the top 3 towns or cities you would most like to visit in the next 12 to 24 months?
What 3 towns or cities do you believe currently offer the best job opportunities?
The intent with these questions was to not anchor people to a specific list of places, and to not necessarily anchor people to big global cities. Maybe the best job opportunities are believed to be in small towns that most people aren't thinking about. The result is that thousands of different towns and cities were mentioned during the survey period.
While this didn't necessarily impact the cities and usual suspects that you would expect to see in a ranking like this -- cities like London, New York, and Paris -- it did change certain things and offer some interesting insights. For example, the strong global perception of Sydney helped to move it into the top 10 for the first in the ten-year history of this report.
On the other end of the spectrum, negative sentiment (outside of China) toward Hong Kong caused the city's ranking to drop precipitously. It is now ranked 97th, behind cities like Naples (Italy), Birmingham (UK), and Rochester (US). Singapore, in case you're wondering, is ranked 5th:
Broadly speaking, the perception data also served to remind us that we continue to have a bias toward cities. When people are asked where they want to live, visit, and work, they still think of the world's biggest and most important places. So despite the rise of decentralizing technologies (i.e. Zoom) and the bad things that happened to cities as a result of the pandemic, big cities remain at the center of the global economy.
This is not at all surprising.
Cover photo by Aaron Gilmore on Unsplash