Yichang in context: Street-network sprawl trends

Yichang in context

33.64.24.8<19751976–19901991–20052006–2020SNDi of street additions
33.64.24.8<19751976–19901991–20052006–2020SNDi of entire street network
YichangHubei (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Yichang plotted against Hubei and China. The SNDi of new construction in Yichang peaked in 1976-1990, compared to Hubei which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Yichang's incremental SNDi fell from 3.24 to 3.17 between 1991-2005 and 2006-2020. In terms of the aggregate network, Yichang ranked 48th out of 77 cities in Hubei and 1114th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.17
Rank in China
982nd of 1843
Rank in Hubei
39th of 77

Entire Network (Aggregate)

SNDi value
3.11
Rank in China
1114th of 1843
Rank in Hubei
48th of 77

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

What about similarly populated cities?

34567<19751976–19901991–20052006–2020SNDi of street additions
34567<19751976–19901991–20052006–2020SNDi of entire street network
YichangDehradunThrissur

While Dehradun and Thrissur both built increasingly disconnected streets over time, Yichang built increasingly disconnected streets from 1975 through 1976-1990, then improved in new street additions. For the full street network, though, all three cities follow the same trend. Yichang and Dehradun have been growing further apart in their street-network character since 1975.