Longjiang in context: Street-network sprawl trends

Longjiang in context

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
LongjiangHeilongjiang (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Longjiang plotted against Heilongjiang and China. The SNDi of new construction in Longjiang rose steadily, compared to Heilongjiang which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Longjiang's incremental SNDi rose from 3.25 to 3.63 between 1991-2005 and 2006-2020. In terms of the aggregate network, Longjiang ranked 35th out of 67 cities in Heilongjiang and 584th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.63
Rank in China
1215th of 1843
Rank in Heilongjiang
42nd of 67

Entire Network (Aggregate)

SNDi value
2.49
Rank in China
584th of 1843
Rank in Heilongjiang
35th of 67

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
LongjiangXinjiangLinhares

In new street additions, Longjiang built increasingly disconnected streets over time, while Xinjiang built increasingly disconnected streets from 1975 through 1991-2005, then improved and Linhares fluctuated in its street-construction patterns. For the full network, Longjiang and Linhares both became progressively more disconnected, while Xinjiang grew more disconnected from 1975 through 1991-2005, then improved. Longjiang and Linhares have been converging in their street-network character since 1975.