Simao in context: Street-network sprawl trends

Simao in context

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
SimaoYunnan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Simao plotted against Yunnan and China. The SNDi of new construction in Simao rose steadily, compared to Yunnan which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Simao's incremental SNDi rose from 3.27 to 3.71 between 1991-2005 and 2006-2020. In terms of the aggregate network, Simao ranked 45th out of 78 cities in Yunnan and 1099th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.71
Rank in China
1255th of 1843
Rank in Yunnan
51st of 78

Entire Network (Aggregate)

SNDi value
3.09
Rank in China
1099th of 1843
Rank in Yunnan
45th of 78

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

What about similarly populated cities?

22.533.5<19751976–19901991–20052006–2020SNDi of street additions
22.533.5<19751976–19901991–20052006–2020SNDi of entire street network
SimaoZhengdingZhongjiang

In new street additions, Simao and Zhongjiang both built increasingly disconnected streets over time, while Zhengding fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend. Notably, Simao had a more connected network than Zhengding in 1975 but the two have since reversed their relative ranking.