Omura in context: Street-network sprawl trends

Omura in context

2.433.6<19751976–19901991–20052006–2020SNDi of street additions
2.433.6<19751976–19901991–20052006–2020SNDi of entire street network
OmuraNaoasaki (Region)Japan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Omura plotted against Naoasaki and Japan. The SNDi of new construction in Omura peaked in 1976-1990, compared to Naoasaki which followed a zig-zag trend with an overall increase and Japan which followed a zig-zag trend with an overall increase. Most recently, Omura's incremental SNDi fell from 2.79 to 2.77 between 1991-2005 and 2006-2020. In terms of the aggregate network, Omura ranked 1st out of 4 cities in Naoasaki and 84th out of 135 in Japan as of 2020.

New Street Additions (2006–2020)

SNDi value
2.77
Rank in Japan
80th of 135
Rank in Naoasaki
1st of 4

Entire Network (Aggregate)

SNDi value
2.48
Rank in Japan
84th of 135
Rank in Naoasaki
1st of 4

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

What about similarly populated cities?

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
OmuraOuled DjellalSopore

In new street additions, Omura built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Ouled Djellal fluctuated in its street-construction patterns and Sopore built increasingly disconnected streets over time. For the full network, Omura and Sopore both became progressively more disconnected, while Ouled Djellal grew more disconnected from 1975 through 1976-1990, then improved. Omura and Ouled Djellal have been growing further apart in their street-network character since 1975.