A paywalled paper in the Royal Society's journal Interface argues that the world's underground rail systems are all converging on an "ideal" form. The paper, "A long-time limit for world subway networks," shows that subway systems grow "organically," in response to the needs expressed by the cities above them over the course of decades, and reveal truths about the shape of cities. In Wired, Brandon Keim describes the findings:
Patterns emerged: The core-and-branch topology, of course, and patterns more fine-grained. Roughly half the stations in any subway will be found on its outer branches rather than the core. The distance from a city’s center to its farthest terminus station is twice the diameter of the subway system’s core. This happens again and again.
“Many other shapes could be expected, such as a regular lattice,” said Barthelemy. “What we find surprising is that all these different cities, on different continents, with different histories and geographical constraints, lead finally to the same structure.”
Subway systems seem to gravitate towards these ratios organically, through a combination of planning, expedience, circumstance and socioeconomic fluctuation, say the researchers.
World’s Subways Converging on Ideal Form
For years, Anita Sarkeesian and her crew at Feminist Frequency (previously) have been striking terror into the hearts of reactionary assholes by saying calm, smart, funny, sensible and insightful things about how video games reveal our social attitudes.
I’m in the UK for the British Walkaway tour, which kicks off tonight at 7PM in Oxford where I’ll be in conversation with Tim Harford at Blackwells.
I took great advantage of my 36 hour hiatus from the Walkaway tour, but I’m back at it today, with a 2PM appearance at Burbank’s Dark Delicacies, before I go straight to the airport to fly to the UK for my British tour.
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Learning to code is a perfect way to grow your technical sophistication, and open up a host of new career options. But since most “learn to code” initiatives focus heavily on web development, it can be tough to find good resources for general-purpose computer science outside of a 4-year degree program. To get a broad […]