Ota in context: Street-network sprawl trends
Ota in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ota plotted against Gunma and Japan. The SNDi of new construction in Ota peaked in 1976-1990, compared to Gunma which peaked in 1976-1990 and Japan which followed a zig-zag trend with an overall increase. Most recently, Ota's incremental SNDi fell from 1.91 to 1.87 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ota ranked 2nd out of 3 cities in Gunma and 18th out of 135 in Japan as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 1.87
- Rank in Japan
- 17th of 135
- Rank in Gunma
- 2nd of 3
Entire Network (Aggregate)
- SNDi value
- 1.67
- Rank in Japan
- 18th of 135
- Rank in Gunma
- 2nd of 3
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
In new street additions, Ota and Ulan-Ude both built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Cherkasy fluctuated in its street-construction patterns. For the full network, Ota and Cherkasy both became progressively more disconnected, while Ulan-Ude grew more disconnected from 1975 through 1991-2005, then improved. Notably, Ota had a more sprawly network than Cherkasy in 1975 but the two have since reversed their relative ranking.