Yongtai County in context: Street-network sprawl trends

Yongtai County in context

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

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Yongtai County plotted against Fujian and China. The SNDi of new construction in Yongtai County rose steadily, compared to Fujian which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Yongtai County's incremental SNDi rose from 2.47 to 3.04 between 1991-2005 and 2006-2020. In terms of the aggregate network, Yongtai County ranked 15th out of 75 cities in Fujian and 616th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.04
Rank in China
909th of 1843
Rank in Fujian
22nd of 75

Entire Network (Aggregate)

SNDi value
2.54
Rank in China
616th of 1843
Rank in Fujian
15th of 75

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

What about similarly populated cities?

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
Yongtai CountyDarbastaTolga

In new street additions, Yongtai County and Tolga both built increasingly disconnected streets over time, while Darbasta fluctuated in its street-construction patterns. For the full network, Yongtai County and Tolga both became progressively more disconnected, while Darbasta fluctuated in connectivity. Yongtai County and Darbasta have been converging in their street-network character since 1975.