Marugame in context: Street-network sprawl trends

Marugame in context

22.533.54<19751976–19901991–20052006–2020SNDi of street additions
22.533.54<19751976–19901991–20052006–2020SNDi of entire street network
MarugameKagawa (Region)Japan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Marugame plotted against Kagawa and Japan. The SNDi of new construction in Marugame rose steadily, compared to Kagawa which followed a zig-zag trend with an overall increase and Japan which followed a zig-zag trend with an overall increase. Most recently, Marugame's incremental SNDi rose from 3.27 to 3.81 between 1991-2005 and 2006-2020. In terms of the aggregate network, Marugame ranked 1st out of 2 cities in Kagawa and 104th out of 135 in Japan as of 2020.

New Street Additions (2006–2020)

SNDi value
3.81
Rank in Japan
112th of 135
Rank in Kagawa
2nd of 2

Entire Network (Aggregate)

SNDi value
2.72
Rank in Japan
104th of 135
Rank in Kagawa
1st of 2

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

What about similarly populated cities?

2.73.64.55.4<19751976–19901991–20052006–2020SNDi of street additions
2.73.64.55.4<19751976–19901991–20052006–2020SNDi of entire street network
MarugameNanbuTinsukia

In new street additions, Marugame and Tinsukia both built increasingly disconnected streets over time, while Nanbu fluctuated in its street-construction patterns. For the full network, Marugame and Tinsukia both became progressively more disconnected, while Nanbu fluctuated in connectivity. Marugame and Tinsukia have been growing further apart in their street-network character since 1975.