Chaling in context: Street-network sprawl trends

Chaling in context

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
ChalingHunan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Chaling plotted against Hunan and China. The SNDi of new construction in Chaling peaked in 1991-2005, compared to Hunan which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Chaling's incremental SNDi fell from 4.2 to 2.51 between 1991-2005 and 2006-2020. In terms of the aggregate network, Chaling ranked 60th out of 89 cities in Hunan and 1314th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.51
Rank in China
520th of 1843
Rank in Hunan
33rd of 89

Entire Network (Aggregate)

SNDi value
3.41
Rank in China
1314th of 1843
Rank in Hunan
60th of 89

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

What about similarly populated cities?

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
ChalingLansingBani

In new street additions, Chaling built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Lansing built increasingly disconnected streets over time and Baní fluctuated in its street-construction patterns. Looking at the full network, Lansing and Baní both became progressively more disconnected, while Chaling grew more disconnected from 1975 through 1991-2005, then improved. Chaling and Baní have been converging in their street-network character since 1975.