Longchang in context: Street-network sprawl trends

Longchang in context

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

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Longchang plotted against Sichuan and China. The SNDi of new construction in Longchang fell steadily, compared to Sichuan which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Longchang's incremental SNDi fell from 1.93 to 1.69 between 1991-2005 and 2006-2020. In terms of the aggregate network, Longchang ranked 10th out of 98 cities in Sichuan and 246th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.69
Rank in China
113th of 1843
Rank in Sichuan
4th of 98

Entire Network (Aggregate)

SNDi value
2.03
Rank in China
246th of 1843
Rank in Sichuan
10th of 98

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
LongchangTerrassaEast London

While Terrassa and East London both built increasingly disconnected streets over time, Longchang built increasingly connected streets over time in new street additions. Looking at the full network, Terrassa and East London both became progressively more disconnected, while Longchang became progressively more connected. Longchang and Terrassa have been converging in their street-network character since 1975.