The picture below is the network of paths at the campus of Michigan State University. It's famous because, as new buildings were added the planners let the people find their own pathways, and were guided by those, rather than imposing a preconceived layout.
Such user-chosen routes are often called 'paths of desire' and reflect what people have discovered works for them. There is a good Guardian article about paths of desire at
Paths of Desire
The picture below is the network of paths at the campus of Michigan State University. It's famous because, as new buildings were added the planners let the people find their own pathways, and were guided by those, rather than imposing a preconceived layout.
Such user-chosen routes are often called 'paths of desire' and reflect what people have discovered works for them. There is a good Guardian article about paths of desire at
https://www.theguardian.com/cities/2018/oct/05/desire-paths-the-illicit-trails-that-defy-the-urban-planners
I'm also indebted to Brian Horton, New Scientist Letters, 4 April, who made me aware of all this.