Wakayama in context: Street-network sprawl trends

Wakayama 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
WakayamaJapan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Wakayama plotted against Japan. The SNDi of new construction in Wakayama peaked in 1976-1990, while Japan followed a zig-zag trend with an overall increase. Most recently, Wakayama's incremental SNDi fell from 4.53 to 3.68 between 1991-2005 and 2006-2020. In terms of the aggregate network, Wakayama ranked 124th out of 135 in Japan as of 2020.

New Street Additions (2006–2020)

SNDi value
3.68
Rank in Japan
107th of 135

Entire Network (Aggregate)

SNDi value
3.1
Rank in Japan
124th of 135

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
WakayamaJianhuUlan-Ude

Wakayama, Jianhu, and Ulan-Ude all built increasingly disconnected streets from 1975 through 1976-1990, then improved in new street construction. For the full network, Wakayama became progressively more disconnected, while Jianhu grew more disconnected from 1975 through 1976-1990, then improved and Ulan-Ude grew more disconnected from 1975 through 1991-2005, then improved. Wakayama and Jianhu have been growing further apart in their street-network character since 1975.