Tangjiang in context: Street-network sprawl trends

Tangjiang in context

3.244.85.6<19751976–19901991–20052006–2020SNDi of street additions
3.244.85.6<19751976–19901991–20052006–2020SNDi of entire street network
TangjiangJiangxi (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tangjiang plotted against Jiangxi and China. The SNDi of new construction in Tangjiang was at its lowest in 1991-2005, compared to Jiangxi which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Tangjiang's incremental SNDi rose from 2.93 to 5.49 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tangjiang ranked 69th out of 82 cities in Jiangxi and 1418th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
5.49
Rank in China
1704th of 1843
Rank in Jiangxi
78th of 82

Entire Network (Aggregate)

SNDi value
3.6
Rank in China
1418th of 1843
Rank in Jiangxi
69th of 82

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

What about similarly populated cities?

2.73.64.55.4<19751976–19901991–20052006–2020SNDi of street additions
2.73.64.55.4<19751976–19901991–20052006–2020SNDi of entire street network
TangjiangMansaManna

In new street additions, Tangjiang built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns, while Mansa built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Manna built increasingly disconnected streets over time. For the full network, Tangjiang and Mansa both became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards, while Manna became progressively more disconnected. Notably, Tangjiang had a more sprawly network than Mansa in 1975 but the two have since reversed their relative ranking.