Zhaozhou in context: Street-network sprawl trends

Zhaozhou in context

1234<19751976–19901991–20052006–2020SNDi of street additions
1234<19751976–19901991–20052006–2020SNDi of entire street network
ZhaozhouHeilongjiang (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Zhaozhou plotted against Heilongjiang and China. The SNDi of new construction in Zhaozhou peaked in 1976-1990, compared to Heilongjiang which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Zhaozhou's incremental SNDi fell from 1.46 to 1.31 between 1991-2005 and 2006-2020. In terms of the aggregate network, Zhaozhou ranked 3rd out of 67 cities in Heilongjiang and 23rd out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.31
Rank in China
37th of 1843
Rank in Heilongjiang
3rd of 67

Entire Network (Aggregate)

SNDi value
1.37
Rank in China
23rd of 1843
Rank in Heilongjiang
3rd of 67

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

What about similarly populated cities?

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
ZhaozhouMeilongUpleta

In new street additions, Zhaozhou built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Meilong fluctuated in its street-construction patterns and Upleta built increasingly disconnected streets over time. For the full network, Zhaozhou and Upleta both became progressively more disconnected, while Meilong fluctuated in connectivity. Zhaozhou and Upleta have been growing further apart in their street-network character since 1975.