Huizhou in context: Street-network sprawl trends

Huizhou 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
HuizhouGuangdong (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Huizhou plotted against Guangdong and China. The SNDi of new construction in Huizhou 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, Huizhou's incremental SNDi rose from 2.31 to 2.66 between 1991-2005 and 2006-2020. In terms of the aggregate network, Huizhou ranked 20th out of 133 cities in Guangdong and 430th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.66
Rank in China
632nd of 1843
Rank in Guangdong
22nd of 133

Entire Network (Aggregate)

SNDi value
2.3
Rank in China
430th of 1843
Rank in Guangdong
20th of 133

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

What about similarly populated cities?

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
HuizhouTbilisiCologne

In new street additions, Huizhou and Cologne both built increasingly disconnected streets over time, while Tbilisi built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full street network, though, all three cities follow the same trend. Huizhou and Cologne have been growing further apart in their street-network character since 1975.