Songbei in context: Street-network sprawl trends

Songbei 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
SongbeiHeilongjiang (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Songbei plotted against Heilongjiang and China. While Heilongjiang and China both followed a zig-zag trend with an overall increase, Songbei's new street additions followed a zig-zag trend with an overall increase. Most recently, Songbei's incremental SNDi rose from 2.6 to 4.56 between 1991-2005 and 2006-2020. In terms of the aggregate network, Songbei ranked 64th out of 67 cities in Heilongjiang and 1609th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
4.56
Rank in China
1547th of 1843
Rank in Heilongjiang
59th of 67

Entire Network (Aggregate)

SNDi value
4.23
Rank in China
1609th of 1843
Rank in Heilongjiang
64th 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
SongbeiKamyaranBishunpur Khurd

In new street additions, Songbei fluctuated in its street-construction patterns, while Kamyaran built increasingly disconnected streets from 1975 through 1991-2005, then improved and Bishunpur Khurd fluctuated in its street-construction patterns. For the full network, Songbei fluctuated in connectivity, while Kamyaran became progressively more disconnected and Bishunpur Khurd fluctuated in connectivity. Notably, Songbei had a more connected network than Kamyaran in 1975 but the two have since reversed their relative ranking.