Shuangyashan in context: Street-network sprawl trends

Shuangyashan in context

2.433.64.2<19751976–19901991–20052006–2020SNDi of street additions
2.433.64.2<19751976–19901991–20052006–2020SNDi of entire street network
ShuangyashanHeilongjiang (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Shuangyashan plotted against Heilongjiang and China. While Heilongjiang and China both followed a zig-zag trend with an overall increase, Shuangyashan's new street additions followed a zig-zag trend with an overall increase. Most recently, Shuangyashan's incremental SNDi rose from 2.75 to 2.85 between 1991-2005 and 2006-2020. In terms of the aggregate network, Shuangyashan ranked 41st out of 67 cities in Heilongjiang and 744th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.85
Rank in China
772nd of 1843
Rank in Heilongjiang
31st of 67

Entire Network (Aggregate)

SNDi value
2.69
Rank in China
744th of 1843
Rank in Heilongjiang
41st of 67

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

What about similarly populated cities?

2.73.64.55.4<19751976–19901991–20052006–2020SNDi of street additions
2.73.64.55.4<19751976–19901991–20052006–2020SNDi of entire street network
ShuangyashanCaoxianSampit

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