Hai'an in context: Street-network sprawl trends

Hai'an in context

33.544.5<19751976–19901991–20052006–2020SNDi of street additions
33.544.5<19751976–19901991–20052006–2020SNDi of entire street network
Hai'anJiangsu (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Hai'an plotted against Jiangsu and China. The SNDi of new construction in Hai'an peaked in 1976-1990, compared to Jiangsu which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Hai'an's incremental SNDi fell from 4.1 to 3.78 between 1991-2005 and 2006-2020. In terms of the aggregate network, Hai'an ranked 88th out of 101 cities in Jiangsu and 1510th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.78
Rank in China
1301st of 1843
Rank in Jiangsu
84th of 101

Entire Network (Aggregate)

SNDi value
3.86
Rank in China
1510th of 1843
Rank in Jiangsu
88th of 101

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

What about similarly populated cities?

36912<19751976–19901991–20052006–2020SNDi of street additions
36912<19751976–19901991–20052006–2020SNDi of entire street network
Hai'anKorhogoKazipur

In new street additions, Hai'an built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Korhogo fluctuated in its street-construction patterns and Kazipur built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Hai'an and Kazipur both grew more disconnected from 1975 through 1991-2005, then improved, while Korhogo became progressively more disconnected. Notably, Hai'an had a more sprawly network than Kazipur in 1975 but the two have since reversed their relative ranking.