Xihua in context: Street-network sprawl trends

Xihua 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
XihuaHenan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Xihua plotted against Henan and China. While Henan and China both followed a zig-zag trend with an overall increase, Xihua's new street additions followed a zig-zag trend with an overall increase. Most recently, Xihua's incremental SNDi rose from 1.71 to 2.72 between 1991-2005 and 2006-2020. In terms of the aggregate network, Xihua ranked 22nd out of 129 cities in Henan and 152nd out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.72
Rank in China
673rd of 1843
Rank in Henan
79th of 129

Entire Network (Aggregate)

SNDi value
1.86
Rank in China
152nd of 1843
Rank in Henan
22nd of 129

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

What about similarly populated cities?

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
XihuaDerouaCankiri

In new street additions, Xihua and Çankırı both fluctuated in its street-construction patterns, while Deroua built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Xihua became progressively more disconnected, while Deroua became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards and Çankırı fluctuated in connectivity. Notably, Xihua had a more connected network than Deroua in 1975 but the two have since reversed their relative ranking.