Kumagaya in context: Street-network sprawl trends

Kumagaya in context

2.12.42.7<19751976–19901991–20052006–2020SNDi of street additions
2.12.42.7<19751976–19901991–20052006–2020SNDi of entire street network
KumagayaSaitama (Region)Japan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Kumagaya plotted against Saitama and Japan. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Kumagaya's incremental SNDi rose from 2.23 to 2.25 between 1991-2005 and 2006-2020. In terms of the aggregate network, Kumagaya ranked 5th out of 5 cities in Saitama and 56th out of 135 in Japan as of 2020.

New Street Additions (2006–2020)

SNDi value
2.25
Rank in Japan
43rd of 135
Rank in Saitama
4th of 5

Entire Network (Aggregate)

SNDi value
2.18
Rank in Japan
56th of 135
Rank in Saitama
5th of 5

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

What about similarly populated cities?

2.433.6<19751976–19901991–20052006–2020SNDi of street additions
2.433.6<19751976–19901991–20052006–2020SNDi of entire street network
KumagayaGreve StrandJingxing Mining

In new street additions, Kumagaya and Greve Strand both fluctuated in its street-construction patterns, while Jingxing Mining built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Kumagaya and Greve Strand both became progressively more disconnected, while Jingxing Mining fluctuated in connectivity.