Tokyo's Shibuya Crossing Is a Working Public Square Disguised as an Intersection

Shibuya Crossing in central Tokyo runs on a barikadan-shiki kosaten — a scramble crossing — in which all car traffic at five intersecting roads is held simultaneously while pedestrians cross diagonally as well as straight. The signal cycle pauses cars for roughly 46 seconds. In that window, on a busy weekend evening, somewhere between 2,500 and 3,000 people move through the box.

The figure is repeated often enough to feel mythic, but it has been measured. The Tokyo Metropolitan Government and journalists with cameras over Shibuya have produced consistent counts. The peak hour passes around 70,000 people through a single intersection. By comparison, New York's Times Square sees roughly 50,000 pedestrians an hour at its busiest, spread over a much larger area.

What makes Shibuya specifically work is the geometry. Five streets converge — Bunkamura-dori, Center Gai, Inokashira-dori, Dogenzaka, and the road in front of Shibuya Station — at angles that distribute walkers across more than two crossings. The current configuration dates from 1973, when the area was redesigned around the bronze statue of Hachiko, the loyal dog who waited at the station for his dead owner from 1925 until his own death in 1935. The statue has become the city's default meeting point.

The scramble itself is older than the redesign. Tokyo, Osaka, and a number of Japanese cities adopted scramble crossings in the 1960s, copying a 1947 American invention by traffic engineer Henry Barnes (the original "Barnes Dance," first installed in Denver and Kansas City). What Tokyo did was scale it.

A quiet weekday morning, with no crowd, looks empty. The intersection only makes sense when it is full.