Xuchang in context: Street-network sprawl trends

Xuchang 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
XuchangHenan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Xuchang plotted against Henan and China. The SNDi of new construction in Xuchang peaked in 1976-1990, compared to Henan which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Xuchang's incremental SNDi fell from 2.67 to 2.67 between 1991-2005 and 2006-2020. In terms of the aggregate network, Xuchang ranked 75th out of 129 cities in Henan and 741st out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.67
Rank in China
637th of 1843
Rank in Henan
77th of 129

Entire Network (Aggregate)

SNDi value
2.69
Rank in China
741st of 1843
Rank in Henan
75th of 129

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

What about similarly populated cities?

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
XuchangAucklandStockholm

In new street additions, Xuchang built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Auckland built increasingly disconnected streets from 1975 through 1991-2005, then improved and Stockholm built increasingly disconnected streets over time. Looking at the full network, Auckland and Stockholm both became progressively more disconnected, while Xuchang grew more disconnected from 1975 through 1976-1990, then improved.