Hengyang in context: Street-network sprawl trends

Hengyang in context

3.64.24.8<19751976–19901991–20052006–2020SNDi of street additions
3.64.24.8<19751976–19901991–20052006–2020SNDi of entire street network
HengyangHunan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Hengyang plotted against Hunan and China. While Hunan and China both followed a zig-zag trend with an overall increase, Hengyang's new street additions followed a zig-zag trend with an overall increase. Most recently, Hengyang's incremental SNDi rose from 3.64 to 4.25 between 1991-2005 and 2006-2020.

New Street Additions (2006–2020)

SNDi value
4.25

Entire Network (Aggregate)

SNDi value
3.88

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

What about similarly populated cities?

246810<19751976–19901991–20052006–2020SNDi of street additions
246810<19751976–19901991–20052006–2020SNDi of entire street network
HengyangDniproBayamon [San Juan]

In new street additions, Hengyang fluctuated in its street-construction patterns, while Dnipro built increasingly disconnected streets over time and Bayamón [San Juan] built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Dnipro and Bayamón [San Juan] both became progressively more disconnected, while Hengyang fluctuated in connectivity. Hengyang and Bayamón [San Juan] have been growing further apart in their street-network character since 1975.