Jingang in context: Street-network sprawl trends

Jingang in context

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
JingangHunan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Jingang plotted against Hunan and China. The SNDi of new construction in Jingang peaked in 1976-1990, compared to Hunan which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Jingang's incremental SNDi fell from 1.9 to 1.65 between 1991-2005 and 2006-2020. In terms of the aggregate network, Jingang ranked 7th out of 89 cities in Hunan and 250th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.65
Rank in China
103rd of 1843
Rank in Hunan
6th of 89

Entire Network (Aggregate)

SNDi value
2.04
Rank in China
250th of 1843
Rank in Hunan
7th of 89

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
JingangIsahayaTrincomalee

While Isahaya and Trincomalee both fluctuated in its street-construction patterns, Jingang built increasingly disconnected streets from 1975 through 1976-1990, then improved in new street additions. Looking at the full network, Isahaya and Trincomalee both became progressively more disconnected, while Jingang grew more disconnected from 1975 through 1976-1990, then improved. Jingang and Isahaya have been growing further apart in their street-network character since 1975.