Ube in context: Street-network sprawl trends

Ube in context

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
UbeYamaguchi (Region)Japan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ube plotted against Yamaguchi and Japan. The SNDi of new construction in Ube rose steadily, compared to Yamaguchi which followed a zig-zag trend with an overall increase and Japan which followed a zig-zag trend with an overall increase. Most recently, Ube's incremental SNDi rose from 3.78 to 4.4 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ube ranked 2nd out of 5 cities in Yamaguchi and 116th out of 135 in Japan as of 2020.

New Street Additions (2006–2020)

SNDi value
4.4
Rank in Japan
124th of 135
Rank in Yamaguchi
3rd of 5

Entire Network (Aggregate)

SNDi value
2.94
Rank in Japan
116th of 135
Rank in Yamaguchi
2nd of 5

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
Ube`AmranWei

In new street additions, Ube and Wei both built increasingly disconnected streets over time, while `Amran fluctuated in its street-construction patterns. For the full network, Ube and Wei both became progressively more disconnected, while `Amran fluctuated in connectivity. Ube and `Amran have been growing further apart in their street-network character since 1975.