Ningling in context: Street-network sprawl trends

Ningling in context

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
NinglingHenan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ningling plotted against Henan and China. While Henan and China both followed a zig-zag trend with an overall increase, Ningling's new street additions followed a zig-zag trend with an overall decrease. Most recently, Ningling's incremental SNDi rose from 1.64 to 1.92 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ningling ranked 26th out of 129 cities in Henan and 169th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.92
Rank in China
214th of 1843
Rank in Henan
25th of 129

Entire Network (Aggregate)

SNDi value
1.89
Rank in China
169th of 1843
Rank in Henan
26th of 129

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

What about similarly populated cities?

246<19751976–19901991–20052006–2020SNDi of street additions
246<19751976–19901991–20052006–2020SNDi of entire street network
NinglingPudingSakhi Sarwar

In new street additions, Ningling and Puding both fluctuated in its street-construction patterns, while Sakhi Sarwar built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Ningling fluctuated in connectivity, while Puding became progressively more disconnected and Sakhi Sarwar grew more disconnected from 1975 through 1991-2005, then improved. Notably, Ningling had a more sprawly network than Puding in 1975 but the two have since reversed their relative ranking.