Guannan in context: Street-network sprawl trends

Guannan in context

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
GuannanJiangsu (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Guannan plotted against Jiangsu and China. The SNDi of new construction in Guannan peaked in 1991-2005, compared to Jiangsu which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Guannan's incremental SNDi fell from 2.2 to 1.98 between 1991-2005 and 2006-2020. In terms of the aggregate network, Guannan ranked 10th out of 101 cities in Jiangsu and 157th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.98
Rank in China
239th of 1843
Rank in Jiangsu
15th of 101

Entire Network (Aggregate)

SNDi value
1.87
Rank in China
157th of 1843
Rank in Jiangsu
10th of 101

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

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
GuannanUbon RatchathaniDonghai

In new street additions, Guannan built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Ubon Ratchathani built increasingly disconnected streets over time and Donghai built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Guannan and Ubon Ratchathani both became progressively more disconnected, while Donghai became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards.