Sihong County in context: Street-network sprawl trends

Sihong County in context

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

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Sihong County plotted against Jiangsu and China. The SNDi of new construction in Sihong County rose steadily, compared to Jiangsu which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Sihong County's incremental SNDi rose from 1.11 to 1.25 between 1991-2005 and 2006-2020. In terms of the aggregate network, Sihong County ranked 1st out of 101 cities in Jiangsu and 5th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.25
Rank in China
31st of 1843
Rank in Jiangsu
3rd of 101

Entire Network (Aggregate)

SNDi value
1.08
Rank in China
5th of 1843
Rank in Jiangsu
1st of 101

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
Sihong CountyLhasaSan Pablo

In new street additions, Sihong County and San Pablo both built increasingly disconnected streets over time, while Lhasa built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Sihong County and San Pablo both became progressively more disconnected, while Lhasa became progressively more connected. Sihong County and San Pablo have been growing further apart in their street-network character since 1975.