Aira in context: Street-network sprawl trends

Aira in context

22.42.83.2<19751976–19901991–20052006–2020SNDi of street additions
22.42.83.2<19751976–19901991–20052006–2020SNDi of entire street network
AiraKagoshima (Region)Japan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Aira plotted against Kagoshima and Japan. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Aira's incremental SNDi rose from 2.39 to 2.76 between 1991-2005 and 2006-2020. In terms of the aggregate network, Aira ranked 2nd out of 3 cities in Kagoshima and 67th out of 135 in Japan as of 2020.

New Street Additions (2006–2020)

SNDi value
2.76
Rank in Japan
78th of 135
Rank in Kagoshima
2nd of 3

Entire Network (Aggregate)

SNDi value
2.26
Rank in Japan
67th of 135
Rank in Kagoshima
2nd of 3

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
AiraFiruzabadBalod

Aira, Firuzabad, and Balod all fluctuated in its street-construction patterns in new street construction. For the full network, Aira and Firuzabad both became progressively more disconnected, while Balod fluctuated in connectivity. Aira and Firuzabad have been growing further apart in their street-network character since 1975.