Tsuruga in context: Street-network sprawl trends

Tsuruga in context

1.622.42.8<19751976–19901991–20052006–2020SNDi of street additions
1.622.42.8<19751976–19901991–20052006–2020SNDi of entire street network
TsurugaFukui (Region)Japan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tsuruga plotted against Fukui and Japan. The SNDi of new construction in Tsuruga rose steadily, compared to Fukui which followed a zig-zag trend with an overall increase and Japan which followed a zig-zag trend with an overall increase. Most recently, Tsuruga's incremental SNDi rose from 2.32 to 2.42 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tsuruga ranked 3rd out of 3 cities in Fukui and 37th out of 135 in Japan as of 2020.

New Street Additions (2006–2020)

SNDi value
2.42
Rank in Japan
54th of 135
Rank in Fukui
3rd of 3

Entire Network (Aggregate)

SNDi value
1.98
Rank in Japan
37th of 135
Rank in Fukui
3rd of 3

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

What about similarly populated cities?

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
TsurugaMangochiKedougou

In new street additions, Tsuruga built increasingly disconnected streets over time, while Mangochi built increasingly disconnected streets from 1975 through 1991-2005, then improved and Kedougou built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Tsuruga and Mangochi both became progressively more disconnected, while Kedougou became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards.