Dazhu in context: Street-network sprawl trends

Dazhu in context

3.54.24.95.6<19751976–19901991–20052006–2020SNDi of street additions
3.54.24.95.6<19751976–19901991–20052006–2020SNDi of entire street network
DazhuSichuan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Dazhu plotted against Sichuan and China. The SNDi of new construction in Dazhu rose 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, Dazhu's incremental SNDi rose from 5.45 to 5.63 between 1991-2005 and 2006-2020. In terms of the aggregate network, Dazhu ranked 81st out of 98 cities in Sichuan and 1680th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
5.63
Rank in China
1718th of 1843
Rank in Sichuan
87th of 98

Entire Network (Aggregate)

SNDi value
4.65
Rank in China
1680th of 1843
Rank in Sichuan
81st of 98

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

What about similarly populated cities?

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
DazhuFoumbanJagdishpur

In new street additions, Dazhu and Jagdishpur both built increasingly disconnected streets over time, while Foumban built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full street network, though, all three cities follow the same trend. Dazhu and Foumban have been growing further apart in their street-network character since 1975.