Yiliang in context: Street-network sprawl trends

Yiliang in context

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

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Yiliang plotted against Yunnan and China. The SNDi of new construction in Yiliang peaked in 1976-1990, 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, Yiliang's incremental SNDi fell from 2.22 to 1.6 between 1991-2005 and 2006-2020.

New Street Additions (2006–2020)

SNDi value
1.6

Entire Network (Aggregate)

SNDi value
2.35

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

What about similarly populated cities?

0.91.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
0.91.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
YiliangNouadhibouTepi

In new street additions, Yiliang built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Nouadhibou fluctuated in its street-construction patterns and Tepi built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Yiliang grew more disconnected from 1975 through 1976-1990, then improved, while Nouadhibou fluctuated in connectivity and Tepi became progressively more disconnected. Yiliang and Nouadhibou have been growing further apart in their street-network character since 1975.