Dangyang in context: Street-network sprawl trends

Dangyang in context

2.433.64.24.8<19751976–19901991–20052006–2020SNDi of street additions
2.433.64.24.8<19751976–19901991–20052006–2020SNDi of entire street network
DangyangHubei (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Dangyang plotted against Hubei and China. While Hubei and China both followed a zig-zag trend with an overall increase, Dangyang's new street additions followed a zig-zag trend with an overall increase. Most recently, Dangyang's incremental SNDi rose from 2.84 to 4.63 between 1991-2005 and 2006-2020. In terms of the aggregate network, Dangyang ranked 54th out of 77 cities in Hubei and 1228th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
4.63
Rank in China
1562nd of 1843
Rank in Hubei
72nd of 77

Entire Network (Aggregate)

SNDi value
3.27
Rank in China
1228th of 1843
Rank in Hubei
54th of 77

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
DangyangMannarkkadCopiapo

In new street additions, Dangyang and Copiapó both fluctuated in its street-construction patterns, while Mannarkkad built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Dangyang and Copiapó both fluctuated in connectivity, while Mannarkkad became progressively more disconnected. Notably, Dangyang had a more connected network than Copiapó in 1975 but the two have since reversed their relative ranking.