Leshan in context: Street-network sprawl trends

Leshan in context

2.83.54.24.9<19751976–19901991–20052006–2020SNDi of street additions
2.83.54.24.9<19751976–19901991–20052006–2020SNDi of entire street network
LeshanSichuan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Leshan plotted against Sichuan and China. The SNDi of new construction in Leshan peaked in 1976-1990, 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, Leshan's incremental SNDi fell from 2.89 to 2.86 between 1991-2005 and 2006-2020. In terms of the aggregate network, Leshan ranked 39th out of 98 cities in Sichuan and 960th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.86
Rank in China
781st of 1843
Rank in Sichuan
33rd of 98

Entire Network (Aggregate)

SNDi value
2.92
Rank in China
960th of 1843
Rank in Sichuan
39th of 98

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

What about similarly populated cities?

1.82.433.6<19751976–19901991–20052006–2020SNDi of street additions
1.82.433.6<19751976–19901991–20052006–2020SNDi of entire street network
LeshanHuludaoYongchuan

In new street additions, Leshan built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Huludao built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns and Yongchuan fluctuated in its street-construction patterns. For the full network, Leshan grew more disconnected from 1975 through 1976-1990, then improved, while Huludao became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards and Yongchuan fluctuated in connectivity. Leshan and Huludao have been converging in their street-network character since 1975.