Hamamatsu in context: Street-network sprawl trends

Hamamatsu in context

1.522.53<19751976–19901991–20052006–2020SNDi of street additions
1.522.53<19751976–19901991–20052006–2020SNDi of entire street network
HamamatsuShizuoka (Region)Japan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Hamamatsu plotted against Shizuoka and Japan. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Hamamatsu's incremental SNDi rose from 1.8 to 1.85 between 1991-2005 and 2006-2020. In terms of the aggregate network, Hamamatsu ranked 1st out of 5 cities in Shizuoka and 15th out of 135 in Japan as of 2020.

New Street Additions (2006–2020)

SNDi value
1.85
Rank in Japan
12th of 135
Rank in Shizuoka
1st of 5

Entire Network (Aggregate)

SNDi value
1.63
Rank in Japan
15th of 135
Rank in Shizuoka
1st of 5

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

What about similarly populated cities?

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
HamamatsuWangjiangjingTirupati

In new street additions, Hamamatsu and Tirupati both fluctuated in its street-construction patterns, while Wangjiangjing built increasingly disconnected streets over time. For the full street network, though, all three cities follow the same trend. Hamamatsu and Wangjiangjing have been growing further apart in their street-network character since 1975.