Pingjiang in context: Street-network sprawl trends

Pingjiang in context

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

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Pingjiang plotted against Hunan and China. The SNDi of new construction in Pingjiang 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, Pingjiang's incremental SNDi fell from 2.86 to 1.91 between 1991-2005 and 2006-2020. In terms of the aggregate network, Pingjiang ranked 26th out of 89 cities in Hunan and 567th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.91
Rank in China
205th of 1843
Rank in Hunan
14th of 89

Entire Network (Aggregate)

SNDi value
2.48
Rank in China
567th of 1843
Rank in Hunan
26th 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
PingjiangIlawe-EkitiBataysk

In new street additions, Pingjiang built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Ilawe-Ekiti built increasingly disconnected streets over time and Bataysk fluctuated in its street-construction patterns. Looking at the full network, Ilawe-Ekiti and Bataysk both became progressively more disconnected, while Pingjiang grew more disconnected from 1975 through 1991-2005, then improved. Pingjiang and Ilawe-Ekiti have been growing further apart in their street-network character since 1975.