Kaiyang in context: Street-network sprawl trends

Kaiyang in context

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
KaiyangGuizhou (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Kaiyang plotted against Guizhou and China. The SNDi of new construction in Kaiyang was at its lowest in 1976-1990, compared to Guizhou which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Kaiyang's incremental SNDi rose from 2.01 to 2.11 between 1991-2005 and 2006-2020. In terms of the aggregate network, Kaiyang ranked 3rd out of 41 cities in Guizhou and 236th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.11
Rank in China
299th of 1843
Rank in Guizhou
7th of 41

Entire Network (Aggregate)

SNDi value
2.01
Rank in China
236th of 1843
Rank in Guizhou
3rd of 41

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

What about similarly populated cities?

02468<19751976–19901991–20052006–2020SNDi of street additions
02468<19751976–19901991–20052006–2020SNDi of entire street network
KaiyangToboaliEdea

While Toboali and Edéa both built increasingly disconnected streets over time, Kaiyang built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns in new street additions. Looking at the full network, Toboali and Edéa both became progressively more disconnected, while Kaiyang became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Kaiyang and Toboali have been growing further apart in their street-network character since 1975.