Matsuyama in context: Street-network sprawl trends

Matsuyama in context

22.42.83.2<19751976–19901991–20052006–2020SNDi of street additions
22.42.83.2<19751976–19901991–20052006–2020SNDi of entire street network
MatsuyamaEhime (Region)Japan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Matsuyama plotted against Ehime and Japan. The SNDi of new construction in Matsuyama peaked in 1976-1990, compared to Ehime which followed a zig-zag trend with an overall increase and Japan which followed a zig-zag trend with an overall increase. Most recently, Matsuyama's incremental SNDi fell from 3.06 to 2.5 between 1991-2005 and 2006-2020. In terms of the aggregate network, Matsuyama ranked 4th out of 4 cities in Ehime and 119th out of 135 in Japan as of 2020.

New Street Additions (2006–2020)

SNDi value
2.5
Rank in Japan
58th of 135
Rank in Ehime
1st of 4

Entire Network (Aggregate)

SNDi value
2.98
Rank in Japan
119th of 135
Rank in Ehime
4th of 4

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

What about similarly populated cities?

1.42.12.83.5<19751976–19901991–20052006–2020SNDi of street additions
1.42.12.83.5<19751976–19901991–20052006–2020SNDi of entire street network
MatsuyamaZhanghua CityAnqiu

In new street additions, Matsuyama built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Zhanghua City fluctuated in its street-construction patterns and Anqiu built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Matsuyama and Anqiu both grew more disconnected from 1975 through 1991-2005, then improved, while Zhanghua City became progressively more disconnected. Matsuyama and Anqiu have been converging in their street-network character since 1975.