Yingshan in context: Street-network sprawl trends

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Yingshan plotted against Sichuan and China. The SNDi of new construction in Yingshan followed a zig-zag trend with an overall decrease, compared to Sichuan which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Yingshan's incremental SNDi fell from 1.55 to 1.28 between 1991-2005 and 2006-2020. In terms of the aggregate network, Yingshan ranked 1st out of 98 cities in Sichuan and 22nd out of 1843 in China as of 2020.

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

What about similarly populated cities?

• Islampur, India
• Talagang, Pakistan
• Lujiang, China
• Deqing, China
• Wuchang, China
• Labé, Guinea

In new street additions, Yingshan fluctuated in its street-construction patterns, while Islampur built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Deqing fluctuated in its street-construction patterns. For the full network, Yingshan fluctuated in connectivity, while Islampur became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards and Deqing fluctuated in connectivity. Yingshan and Deqing have been growing further apart in their street-network character since 1975.