Kitakyushu in context: Street-network sprawl trends

Kitakyushu in context

22.42.83.23.6<19751976–19901991–20052006–2020SNDi of street additions
22.42.83.23.6<19751976–19901991–20052006–2020SNDi of entire street network
KitakyushuFukuoka (Region)Japan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Kitakyushu plotted against Fukuoka and Japan. While Fukuoka and Japan both followed a zig-zag trend with an overall increase, Kitakyushu's new street additions followed a zig-zag trend with an overall increase. Most recently, Kitakyushu's incremental SNDi rose from 2.73 to 2.76 between 1991-2005 and 2006-2020. In terms of the aggregate network, Kitakyushu ranked 2nd out of 6 cities in Fukuoka and 70th out of 135 in Japan as of 2020.

New Street Additions (2006–2020)

SNDi value
2.76
Rank in Japan
79th of 135
Rank in Fukuoka
2nd of 6

Entire Network (Aggregate)

SNDi value
2.34
Rank in Japan
70th of 135
Rank in Fukuoka
2nd of 6

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
KitakyushuHiroshimaSendai

In new street additions, Kitakyushu and Hiroshima both fluctuated in its street-construction patterns, while Sendai built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Kitakyushu and Hiroshima both became progressively more disconnected, while Sendai grew more disconnected from 1975 through 1991-2005, then improved.