Nantong in context: Street-network sprawl trends

Nantong 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
NantongJiangsu (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Nantong plotted against Jiangsu and China. The SNDi of new construction in Nantong rose steadily, compared to Jiangsu which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Nantong's incremental SNDi rose from 3.16 to 3.51 between 1991-2005 and 2006-2020. In terms of the aggregate network, Nantong ranked 65th out of 101 cities in Jiangsu and 1120th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.51
Rank in China
1156th of 1843
Rank in Jiangsu
74th of 101

Entire Network (Aggregate)

SNDi value
3.12
Rank in China
1120th of 1843
Rank in Jiangsu
65th of 101

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
NantongPalembangSapporo

While Palembang and Sapporo both fluctuated in its street-construction patterns, Nantong built increasingly disconnected streets over time in new street additions. For the full street network, though, all three cities follow the same trend. Nantong and Sapporo have been growing further apart in their street-network character since 1975.