In the current Journal of Transport and Health, Garrick and Marshall report that cities with more compact street networks—specifically, increased intersection density—have lower levels of obesity, diabetes, high blood pressure, and heart disease. The more intersections, the healthier the humans.

“It might not be common for people to explicitly contemplate health when selecting a place to live,” Garrick and Marshall write, “but this research indicates it is worth considering.”

In many cities the paths are completely segregated from motorised traffic. Sometimes, where space is scant and both must share, you can see signs showing an image of a cyclist with a car behind accompanied by the words 'Bike Street: Cars are guests'.