Yiyuan in context: Street-network sprawl trends

Yiyuan in context

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
YiyuanShandong (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Yiyuan plotted against Shandong and China. While Shandong and China both followed a zig-zag trend with an overall increase, Yiyuan's new street additions followed a zig-zag trend with an overall increase. Most recently, Yiyuan's incremental SNDi rose from 2.82 to 3.05 between 1991-2005 and 2006-2020. In terms of the aggregate network, Yiyuan ranked 80th out of 124 cities in Shandong and 800th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.05
Rank in China
917th of 1843
Rank in Shandong
86th of 124

Entire Network (Aggregate)

SNDi value
2.75
Rank in China
800th of 1843
Rank in Shandong
80th of 124

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
YiyuanHeraklionNankana Sahib

In new street additions, Yiyuan fluctuated in its street-construction patterns, while Heraklion built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns and Nankana Sahib built increasingly disconnected streets over time. For the full network, Yiyuan and Nankana Sahib both became progressively more disconnected, while Heraklion became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Notably, Yiyuan had a more connected network than Heraklion in 1975 but the two have since reversed their relative ranking.