Songzi in context: Street-network sprawl trends

Songzi in context

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
SongziHubei (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Songzi plotted against Hubei and China. While Hubei and China both followed a zig-zag trend with an overall increase, Songzi's new street additions followed a zig-zag trend with an overall increase. Most recently, Songzi's incremental SNDi rose from 1.08 to 2.43 between 1991-2005 and 2006-2020. In terms of the aggregate network, Songzi ranked 10th out of 77 cities in Hubei and 240th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.43
Rank in China
467th of 1843
Rank in Hubei
19th of 77

Entire Network (Aggregate)

SNDi value
2.01
Rank in China
240th of 1843
Rank in Hubei
10th of 77

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

What about similarly populated cities?

1.42.12.83.5<19751976–19901991–20052006–2020SNDi of street additions
1.42.12.83.5<19751976–19901991–20052006–2020SNDi of entire street network
SongziDingbianAndimeshk

In new street additions, Songzi and Dingbian both fluctuated in its street-construction patterns, while Andimeshk built increasingly disconnected streets over time. Looking at the full network, Dingbian and Andimeshk both became progressively more disconnected, while Songzi fluctuated in connectivity. Songzi and Dingbian have been converging in their street-network character since 1975.