“As ranked by a research team of mathematicians and theoretical physicists.” Of course.
For its study, the group analyzed maps of the world’s 15 largest metro transit networks, as determined by total stations. They considered all the trips a traveler could make from Point A to Point B with two connections, then determined the fastest possible path for a given trip. That framework aligned with behavioral research showing that people can store up to four pieces of information in their working memory at one time—in this case, a trip’s origin, its destination, and two transfer stations.
Like we needed even more reasons to pore over cool maps.