Longnan in context: Street-network sprawl trends

Longnan in context

2.73.64.55.4<19751976–19901991–20052006–2020SNDi of street additions
2.73.64.55.4<19751976–19901991–20052006–2020SNDi of entire street network
LongnanJiangxi (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Longnan plotted against Jiangxi and China. The SNDi of new construction in Longnan peaked in 1976-1990, compared to Jiangxi which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Longnan's incremental SNDi fell from 2.64 to 2.18 between 1991-2005 and 2006-2020. In terms of the aggregate network, Longnan ranked 37th out of 82 cities in Jiangxi and 735th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.18
Rank in China
326th of 1843
Rank in Jiangxi
15th of 82

Entire Network (Aggregate)

SNDi value
2.68
Rank in China
735th of 1843
Rank in Jiangxi
37th of 82

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

What about similarly populated cities?

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
LongnanBasankusuDurres

While Basankusu and Durrës both built increasingly disconnected streets over time, Longnan built increasingly disconnected streets from 1975 through 1976-1990, then improved in new street additions. Looking at the full network, Basankusu and Durrës both became progressively more disconnected, while Longnan grew more disconnected from 1975 through 1976-1990, then improved. Longnan and Basankusu have been converging in their street-network character since 1975.