Dong'an in context: Street-network sprawl trends

Dong'an in context

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
Dong'anHunan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Dong'an plotted against Hunan and China. The SNDi of new construction in Dong'an followed a zig-zag trend with an overall decrease, compared to Hunan which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Dong'an's incremental SNDi fell from 3.65 to 3.04 between 1991-2005 and 2006-2020. In terms of the aggregate network, Dong'an ranked 61st out of 89 cities in Hunan and 1328th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.04
Rank in China
904th of 1843
Rank in Hunan
51st of 89

Entire Network (Aggregate)

SNDi value
3.43
Rank in China
1328th of 1843
Rank in Hunan
61st of 89

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

What about similarly populated cities?

246<19751976–19901991–20052006–2020SNDi of street additions
246<19751976–19901991–20052006–2020SNDi of entire street network
Dong'anLintouHawsh Isa

In new street additions, Dong'an fluctuated in its street-construction patterns, while Lintou built increasingly disconnected streets over time and Hawsh Isa built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Dong'an fluctuated in connectivity, while Lintou became progressively more disconnected and Hawsh Isa grew more disconnected from 1975 through 1976-1990, then improved. Notably, Dong'an had a more sprawly network than Lintou in 1975 but the two have since reversed their relative ranking.