Tsukuba in context: Street-network sprawl trends
Tsukuba in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tsukuba plotted against Ibaraki and Japan. The SNDi of new construction in Tsukuba followed a zig-zag trend with an overall decrease, compared to Ibaraki which peaked in 1976-1990 and Japan which followed a zig-zag trend with an overall increase. Most recently, Tsukuba's incremental SNDi fell from 2.02 to 1.74 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tsukuba ranked 1st out of 7 cities in Ibaraki and 30th out of 135 in Japan as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 1.74
- Rank in Japan
- 7th of 135
- Rank in Ibaraki
- 1st of 7
Entire Network (Aggregate)
- SNDi value
- 1.9
- Rank in Japan
- 30th of 135
- Rank in Ibaraki
- 1st of 7
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
In new street additions, Tsukuba fluctuated in its street-construction patterns, while Milak built increasingly disconnected streets from 1975 through 1991-2005, then improved and Parintins fluctuated in its street-construction patterns. For the full network, Tsukuba fluctuated in connectivity, while Milak grew more disconnected from 1975 through 1991-2005, then improved and Parintins fluctuated in connectivity. Tsukuba and Parintins have been growing further apart in their street-network character since 1975.