Nanyang in context: Street-network sprawl trends

Nanyang 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
NanyangHenan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Nanyang plotted against Henan and China. While Henan and China both followed a zig-zag trend with an overall increase, Nanyang's new street additions followed a zig-zag trend with an overall increase. Most recently, Nanyang's incremental SNDi rose from 2.68 to 3.01 between 1991-2005 and 2006-2020. In terms of the aggregate network, Nanyang ranked 71st out of 129 cities in Henan and 718th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.01
Rank in China
888th of 1843
Rank in Henan
94th of 129

Entire Network (Aggregate)

SNDi value
2.66
Rank in China
718th of 1843
Rank in Henan
71st of 129

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
NanyangChenghaiBokaro

In new street additions, Nanyang and Chenghai both fluctuated in its street-construction patterns, while Bokaro built increasingly disconnected streets over time. For the full network, Nanyang and Bokaro both became progressively more disconnected, while Chenghai fluctuated in connectivity. Nanyang and Chenghai have been converging in their street-network character since 1975.