Nanzhao in context: Street-network sprawl trends

Nanzhao 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
NanzhaoHenan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Nanzhao plotted against Henan and China. While Henan and China both followed a zig-zag trend with an overall increase, Nanzhao's new street additions followed a zig-zag trend with an overall increase. Most recently, Nanzhao's incremental SNDi rose from 1.94 to 2.07 between 1991-2005 and 2006-2020. In terms of the aggregate network, Nanzhao ranked 27th out of 129 cities in Henan and 173rd out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.07
Rank in China
283rd of 1843
Rank in Henan
34th of 129

Entire Network (Aggregate)

SNDi value
1.89
Rank in China
173rd of 1843
Rank in Henan
27th of 129

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

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
NanzhaoSolanMelka Chireti

In new street additions, Nanzhao fluctuated in its street-construction patterns, while Solan built increasingly disconnected streets over time and Melka Chireti built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Nanzhao and Solan both became progressively more disconnected, while Melka Chireti fluctuated in connectivity. Nanzhao and Solan have been growing further apart in their street-network character since 1975.