Zhushan in context: Street-network sprawl trends

Zhushan in context

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
ZhushanHubei (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Zhushan plotted against Hubei and China. The SNDi of new construction in Zhushan rose steadily, compared to Hubei which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Zhushan's incremental SNDi rose from 3.58 to 3.78 between 1991-2005 and 2006-2020. In terms of the aggregate network, Zhushan ranked 38th out of 77 cities in Hubei and 986th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.78
Rank in China
1302nd of 1843
Rank in Hubei
63rd of 77

Entire Network (Aggregate)

SNDi value
2.95
Rank in China
986th of 1843
Rank in Hubei
38th of 77

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

What about similarly populated cities?

1.42.12.83.5<19751976–19901991–20052006–2020SNDi of street additions
1.42.12.83.5<19751976–19901991–20052006–2020SNDi of entire street network
ZhushanSangarediVilanculos

Zhushan, Sangarédi, and Vilanculos all built increasingly disconnected streets over time in new street construction. The same pattern holds for the full street network. Zhushan and Vilanculos have been growing further apart in their street-network character since 1975.