Tangzhui in context: Street-network sprawl trends

Tangzhui in context

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
TangzhuiGuangdong (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tangzhui plotted against Guangdong and China. The SNDi of new construction in Tangzhui peaked in 1991-2005, 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, Tangzhui's incremental SNDi fell from 3.34 to 0.79 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tangzhui ranked 47th out of 133 cities in Guangdong and 847th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
0.79
Rank in China
7th of 1843
Rank in Guangdong
3rd of 133

Entire Network (Aggregate)

SNDi value
2.79
Rank in China
847th of 1843
Rank in Guangdong
47th of 133

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

What about similarly populated cities?

0.81.62.43.2<19751976–19901991–20052006–2020SNDi of street additions
0.81.62.43.2<19751976–19901991–20052006–2020SNDi of entire street network
TangzhuiChitoseBaksan

In new street additions, Tangzhui and Baksan both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Chitose built increasingly disconnected streets from 1975 through 1976-1990, then improved. Looking at the full network, Chitose and Baksan both became progressively more disconnected, while Tangzhui grew more disconnected from 1975 through 1991-2005, then improved. Tangzhui and Baksan have been growing further apart in their street-network character since 1975.