Xinmi in context: Street-network sprawl trends

Xinmi in context

33.64.24.8<19751976–19901991–20052006–2020SNDi of street additions
33.64.24.8<19751976–19901991–20052006–2020SNDi of entire street network
XinmiHenan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Xinmi plotted against Henan and China. The SNDi of new construction in Xinmi peaked in 1976-1990, compared to Henan which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Xinmi's incremental SNDi fell from 4.23 to 3.68 between 1991-2005 and 2006-2020. In terms of the aggregate network, Xinmi ranked 126th out of 129 cities in Henan and 1544th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.68
Rank in China
1238th of 1843
Rank in Henan
109th of 129

Entire Network (Aggregate)

SNDi value
3.98
Rank in China
1544th of 1843
Rank in Henan
126th of 129

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

What about similarly populated cities?

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
XinmiYuzhouPunto Fijo

In new street additions, Xinmi built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Yuzhou fluctuated in its street-construction patterns and Punto Fijo built increasingly disconnected streets over time. For the full network, Xinmi grew more disconnected from 1975 through 1991-2005, then improved, while Yuzhou grew more disconnected from 1975 through 1976-1990, then improved and Punto Fijo became progressively more disconnected. Xinmi and Yuzhou have been growing further apart in their street-network character since 1975.