Zhangjiawan in context: Street-network sprawl trends

Zhangjiawan in context

3.23.644.4<19751976–19901991–20052006–2020SNDi of street additions
3.23.644.4<19751976–19901991–20052006–2020SNDi of entire street network
ZhangjiawanBeijing (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Zhangjiawan plotted against Beijing and China. The SNDi of new construction in Zhangjiawan was at its lowest in 1991-2005, compared to Beijing which rose steadily and China which followed a zig-zag trend with an overall increase. Most recently, Zhangjiawan's incremental SNDi rose from 3.5 to 4.46 between 1991-2005 and 2006-2020. In terms of the aggregate network, Zhangjiawan ranked 6th out of 10 cities in Beijing and 1532nd out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
4.46
Rank in China
1523rd of 1843
Rank in Beijing
8th of 10

Entire Network (Aggregate)

SNDi value
3.94
Rank in China
1532nd of 1843
Rank in Beijing
6th of 10

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

What about similarly populated cities?

234567<19751976–19901991–20052006–2020SNDi of street additions
234567<19751976–19901991–20052006–2020SNDi of entire street network
ZhangjiawanNanmaHacienda Rio Blanco

While Nanma and Hacienda Río Blanco both fluctuated in its street-construction patterns, Zhangjiawan built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns in new street additions. Looking at the full network, Nanma and Hacienda Río Blanco both fluctuated in connectivity, while Zhangjiawan became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Notably, Zhangjiawan had a more sprawly network than Hacienda Río Blanco in 1975 but the two have since reversed their relative ranking.