Huachuan in context: Street-network sprawl trends

Huachuan in context

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

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Huachuan plotted against Heilongjiang and China. The SNDi of new construction in Huachuan 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, Huachuan's incremental SNDi fell from 1.78 to 1.32 between 1991-2005 and 2006-2020. In terms of the aggregate network, Huachuan ranked 10th out of 67 cities in Heilongjiang and 87th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.32
Rank in China
38th of 1843
Rank in Heilongjiang
4th of 67

Entire Network (Aggregate)

SNDi value
1.67
Rank in China
87th of 1843
Rank in Heilongjiang
10th of 67

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

What about similarly populated cities?

246<19751976–19901991–20052006–2020SNDi of street additions
246<19751976–19901991–20052006–2020SNDi of entire street network
HuachuanCatarmanQasba Gujrat

In new street additions, Catarman and Qasba Gujrat both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Huachuan built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Huachuan and Qasba Gujrat both grew more disconnected from 1975 through 1991-2005, then improved, while Catarman became progressively more disconnected. Notably, Huachuan had a more sprawly network than Qasba Gujrat in 1975, but the two have since reversed their relative ranking.