Zhecheng in context: Street-network sprawl trends

Zhecheng 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
ZhechengHenan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Zhecheng plotted against Henan and China. The SNDi of new construction in Zhecheng peaked in 1991-2005, compared to Henan which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Zhecheng's incremental SNDi fell from 2.37 to 2.1 between 1991-2005 and 2006-2020. In terms of the aggregate network, Zhecheng ranked 35th out of 129 cities in Henan and 213th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.1
Rank in China
297th of 1843
Rank in Henan
38th of 129

Entire Network (Aggregate)

SNDi value
1.97
Rank in China
213th of 1843
Rank in Henan
35th 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
ZhechengYueyangKangmei

In new street additions, Zhecheng built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Yueyang built increasingly disconnected streets from 1975 through 1976-1990, then improved and Kangmei built increasingly disconnected streets over time. For the full network, Zhecheng and Kangmei both became progressively more disconnected, while Yueyang grew more disconnected from 1975 through 1976-1990, then improved. Notably, Zhecheng had a more sprawly network than Kangmei in 1975 but the two have since reversed their relative ranking.