Hejin in context: Street-network sprawl trends

Hejin in context

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
HejinShanxi (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Hejin plotted against Shanxi and China. The SNDi of new construction in Hejin peaked in 1976-1990, compared to Shanxi which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Hejin's incremental SNDi fell from 3.16 to 2.53 between 1991-2005 and 2006-2020. In terms of the aggregate network, Hejin ranked 34th out of 80 cities in Shanxi and 916th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.53
Rank in China
537th of 1843
Rank in Shanxi
30th of 80

Entire Network (Aggregate)

SNDi value
2.87
Rank in China
916th of 1843
Rank in Shanxi
34th of 80

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

What about similarly populated cities?

0481216<19751976–19901991–20052006–2020SNDi of street additions
0481216<19751976–19901991–20052006–2020SNDi of entire street network
HejinGarwelGwangwa

In new street additions, Hejin built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Garwel built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns and Gwangwa built increasingly disconnected streets over time. For the full network, Hejin grew more disconnected from 1975 through 1991-2005, then improved, while Garwel became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards and Gwangwa became progressively more disconnected. Hejin and Gwangwa have been converging in their street-network character since 1975.