Tsuchiura in context: Street-network sprawl trends

Tsuchiura in context

2.22.42.62.8<19751976–19901991–20052006–2020SNDi of street additions
2.22.42.62.8<19751976–19901991–20052006–2020SNDi of entire street network
TsuchiuraIbaraki (Region)Japan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tsuchiura plotted against Ibaraki and Japan. The SNDi of new construction in Tsuchiura 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, Tsuchiura's incremental SNDi fell from 2.31 to 2.26 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tsuchiura ranked 5th out of 7 cities in Ibaraki and 66th out of 135 in Japan as of 2020.

New Street Additions (2006–2020)

SNDi value
2.26
Rank in Japan
44th of 135
Rank in Ibaraki
5th of 7

Entire Network (Aggregate)

SNDi value
2.26
Rank in Japan
66th of 135
Rank in Ibaraki
5th of 7

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
TsuchiuraJijelKaradeniz Eregli

In new street additions, Tsuchiura built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Jijel built increasingly disconnected streets over time and Karadeniz Ereğli fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend. Tsuchiura and Jijel have been growing further apart in their street-network character since 1975.