Haimen in context: Street-network sprawl trends

Haimen in context

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
HaimenJiangsu (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Haimen plotted against Jiangsu and China. The SNDi of new construction in Haimen peaked in 1991-2005, compared to Jiangsu which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Haimen's incremental SNDi fell from 2.32 to 2.12 between 1991-2005 and 2006-2020. In terms of the aggregate network, Haimen ranked 22nd out of 101 cities in Jiangsu and 308th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.12
Rank in China
305th of 1843
Rank in Jiangsu
19th of 101

Entire Network (Aggregate)

SNDi value
2.15
Rank in China
308th of 1843
Rank in Jiangsu
22nd of 101

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

What about similarly populated cities?

1.82.433.6<19751976–19901991–20052006–2020SNDi of street additions
1.82.433.6<19751976–19901991–20052006–2020SNDi of entire street network
HaimenAnapolisHaifeng

While Anápolis and Haifeng both built increasingly disconnected streets over time, Haimen built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. Looking at the full network, Anápolis and Haifeng both became progressively more disconnected, while Haimen grew more disconnected from 1975 through 1991-2005, then improved. Haimen and Anápolis have been growing further apart in their street-network character since 1975.