Ushiku in context: Street-network sprawl trends

Ushiku in context

1.82.12.42.7<19751976–19901991–20052006–2020SNDi of street additions
1.82.12.42.7<19751976–19901991–20052006–2020SNDi of entire street network
UshikuIbaraki (Region)Japan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ushiku plotted against Ibaraki and Japan. The SNDi of new construction in Ushiku peaked in 1976-1990, compared to Ibaraki which peaked in 1976-1990 and Japan which followed a zig-zag trend with an overall increase. Most recently, Ushiku's incremental SNDi fell from 2.17 to 1.9 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ushiku ranked 4th out of 7 cities in Ibaraki and 55th out of 135 in Japan as of 2020.

New Street Additions (2006–2020)

SNDi value
1.9
Rank in Japan
18th of 135
Rank in Ibaraki
3rd of 7

Entire Network (Aggregate)

SNDi value
2.17
Rank in Japan
55th of 135
Rank in Ibaraki
4th of 7

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
UshikuMehrmaAzemmour

While Mehrma and Azemmour both fluctuated in its street-construction patterns, Ushiku built increasingly disconnected streets from 1975 through 1976-1990, then improved in new street additions. Looking at the full network, Mehrma and Azemmour both became progressively more disconnected, while Ushiku grew more disconnected from 1975 through 1976-1990, then improved. Ushiku and Mehrma have been growing further apart in their street-network character since 1975.