Gongyi in context: Street-network sprawl trends

Gongyi in context

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
GongyiHenan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Gongyi plotted against Henan and China. The SNDi of new construction in Gongyi 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, Gongyi's incremental SNDi fell from 2.38 to 1.81 between 1991-2005 and 2006-2020. In terms of the aggregate network, Gongyi ranked 87th out of 129 cities in Henan and 882nd out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.81
Rank in China
162nd of 1843
Rank in Henan
18th of 129

Entire Network (Aggregate)

SNDi value
2.83
Rank in China
882nd of 1843
Rank in Henan
87th of 129

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
GongyiFu'anRach Gia

In new street additions, Gongyi built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Fu'an built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Rạch Giá built increasingly disconnected streets over time. For the full network, Gongyi grew more disconnected from 1975 through 1976-1990, then improved, while Fu'an became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards and Rạch Giá became progressively more disconnected. Notably, Gongyi had a more sprawly network than Fu'an in 1975 but the two have since reversed their relative ranking.