Qiandeng in context: Street-network sprawl trends

Qiandeng in context

2.433.64.2<19751976–19901991–20052006–2020SNDi of street additions
2.433.64.2<19751976–19901991–20052006–2020SNDi of entire street network
QiandengJiangsu (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Qiandeng plotted against Jiangsu and China. While Jiangsu and China both followed a zig-zag trend with an overall increase, Qiandeng's new street additions followed a zig-zag trend with an overall increase. Most recently, Qiandeng's incremental SNDi rose from 2.6 to 2.81 between 1991-2005 and 2006-2020. In terms of the aggregate network, Qiandeng ranked 45th out of 101 cities in Jiangsu and 780th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.81
Rank in China
747th of 1843
Rank in Jiangsu
49th of 101

Entire Network (Aggregate)

SNDi value
2.73
Rank in China
780th of 1843
Rank in Jiangsu
45th of 101

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

What about similarly populated cities?

1.42.12.83.5<19751976–19901991–20052006–2020SNDi of street additions
1.42.12.83.5<19751976–19901991–20052006–2020SNDi of entire street network
QiandengHoney GablesOlavarria

In new street additions, Qiandeng fluctuated in its street-construction patterns, while Honey Gables built increasingly disconnected streets from 1975 through 1976-1990, then improved and Olavarría built increasingly disconnected streets over time. For the full network, Qiandeng fluctuated in connectivity, while Honey Gables grew more disconnected from 1975 through 1976-1990, then improved and Olavarría became progressively more disconnected. Notably, Qiandeng had a more connected network than Honey Gables in 1975 but the two have since reversed their relative ranking.