Dachen town in context: Street-network sprawl trends

Dachen town in context

1234<19751976–19901991–20052006–2020SNDi of street additions
1234<19751976–19901991–20052006–2020SNDi of entire street network
Dachen townZhejiang (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Dachen town plotted against Zhejiang and China. The SNDi of new construction in Dachen town rose steadily, compared to Zhejiang which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Dachen town's incremental SNDi rose from 2.22 to 2.94 between 1991-2005 and 2006-2020. In terms of the aggregate network, Dachen town ranked 26th out of 116 cities in Zhejiang and 459th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.94
Rank in China
842nd of 1843
Rank in Zhejiang
57th of 116

Entire Network (Aggregate)

SNDi value
2.33
Rank in China
459th of 1843
Rank in Zhejiang
26th of 116

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

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
Dachen townKamoniaAghjabadi

In new street additions, Dachen town built increasingly disconnected streets over time, while Kamonia built increasingly disconnected streets from 1975 through 1991-2005, then improved and Aghjabadi built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Dachen town became progressively more disconnected, while Kamonia grew more disconnected from 1975 through 1991-2005, then improved and Aghjabadi became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Dachen town and Kamonia have been converging in their street-network character since 1975.