Lanshan in context: Street-network sprawl trends

Lanshan in context

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

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Lanshan plotted against Hunan and China. While Hunan and China both followed a zig-zag trend with an overall increase, Lanshan's new street additions followed a zig-zag trend with an overall increase. Most recently, Lanshan's incremental SNDi rose from 1.89 to 3.6 between 1991-2005 and 2006-2020. In terms of the aggregate network, Lanshan ranked 15th out of 89 cities in Hunan as of 2020.

New Street Additions (2006–2020)

SNDi value
3.6
Rank in Hunan
62nd of 89

Entire Network (Aggregate)

SNDi value
2.14
Rank in Hunan
15th of 89

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

What about similarly populated cities?

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
LanshanDamagumBondo

In new street additions, Lanshan fluctuated in its street-construction patterns, while Damagum built increasingly disconnected streets from 1975 through 1976-1990, then improved and Bondo built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Lanshan and Bondo both became progressively more disconnected, while Damagum grew more disconnected from 1975 through 1976-1990, then improved. Lanshan and Damagum have been converging in their street-network character since 1975.