Nobeoka in context: Street-network sprawl trends

Nobeoka 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
NobeokaMiyazaki (Region)Japan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Nobeoka plotted against Miyazaki and Japan. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Nobeoka's incremental SNDi rose from 3.27 to 3.38 between 1991-2005 and 2006-2020. In terms of the aggregate network, Nobeoka ranked 3rd out of 3 cities in Miyazaki and 107th out of 135 in Japan as of 2020.

New Street Additions (2006–2020)

SNDi value
3.38
Rank in Japan
98th of 135
Rank in Miyazaki
3rd of 3

Entire Network (Aggregate)

SNDi value
2.77
Rank in Japan
107th of 135
Rank in Miyazaki
3rd of 3

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

What about similarly populated cities?

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
NobeokaWaterburyDorud

In new street additions, Nobeoka fluctuated in its street-construction patterns, while Waterbury built increasingly disconnected streets from 1975 through 1991-2005, then improved and Dorud built increasingly disconnected streets over time. For the full street network, though, all three cities follow the same trend. Notably, Nobeoka had a more sprawly network than Dorud in 1975 but the two have since reversed their relative ranking.