Huidong in context: Street-network sprawl trends

Huidong in context

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
HuidongGuangdong (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Huidong plotted against Guangdong and China. The SNDi of new construction in Huidong rose steadily, compared to Guangdong which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Huidong's incremental SNDi rose from 3.51 to 3.54 between 1991-2005 and 2006-2020. In terms of the aggregate network, Huidong ranked 53rd out of 133 cities in Guangdong and 1033rd out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.54
Rank in China
1170th of 1843
Rank in Guangdong
57th of 133

Entire Network (Aggregate)

SNDi value
3.0
Rank in China
1033rd of 1843
Rank in Guangdong
53rd of 133

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
HuidongOitaSao Jose do Rio Preto

In new street additions, Huidong and São José do Rio Preto both built increasingly disconnected streets over time, while Oita fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend. Notably, Huidong had a more connected network than Oita in 1975 but the two have since reversed their relative ranking.