Nianzhuang in context: Street-network sprawl trends

Nianzhuang 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
NianzhuangJiangsu (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Nianzhuang plotted against Jiangsu and China. The SNDi of new construction in Nianzhuang followed a zig-zag trend with an overall decrease, compared to Jiangsu which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Nianzhuang's incremental SNDi fell from 1.83 to 1.76 between 1991-2005 and 2006-2020. In terms of the aggregate network, Nianzhuang ranked 9th out of 101 cities in Jiangsu and 116th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.76
Rank in China
143rd of 1843
Rank in Jiangsu
10th of 101

Entire Network (Aggregate)

SNDi value
1.76
Rank in China
116th of 1843
Rank in Jiangsu
9th of 101

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

What about similarly populated cities?

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
NianzhuangLehraLuotian County

In new street additions, Nianzhuang fluctuated in its street-construction patterns, while Lehra fluctuated in its street-construction patterns and Luotian County built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Nianzhuang became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards, while Lehra fluctuated in connectivity and Luotian County grew more disconnected from 1975 through 1991-2005, then improved. Notably, Nianzhuang had a more sprawly network than Luotian County in 1975 but the two have since reversed their relative ranking.