Iwakuni in context: Street-network sprawl trends
Iwakuni in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Iwakuni plotted against Yamaguchi and Japan. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Iwakuni's incremental SNDi rose from 4.21 to 4.73 between 1991-2005 and 2006-2020. In terms of the aggregate network, Iwakuni ranked 4th out of 5 cities in Yamaguchi and 127th out of 135 in Japan as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 4.73
- Rank in Japan
- 130th of 135
- Rank in Yamaguchi
- 5th of 5
Entire Network (Aggregate)
- SNDi value
- 3.25
- Rank in Japan
- 127th of 135
- Rank in Yamaguchi
- 4th of 5
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
- Majenang, Indonesia
- Choma, Zambia
- Nuevo Chimbote, Peru
- Sircilla, India
- Fangcheng District, China
- Escuintla, Guatemala
In new street additions, Iwakuni and Sircilla both fluctuated in its street-construction patterns, while Majenang built increasingly disconnected streets over time. For the full network, Iwakuni and Majenang both became progressively more disconnected, while Sircilla fluctuated in connectivity. Iwakuni and Majenang have been growing further apart in their street-network character since 1975.