Shouxian 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 Shouxian plotted against Anhui and China. The SNDi of new construction in Shouxian peaked in 1991-2005, compared to Anhui which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Shouxian's incremental SNDi fell from 3.67 to 2.99 between 1991-2005 and 2006-2020. In terms of the aggregate network, Shouxian ranked 58th out of 74 cities in Anhui and 1206th 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?

• Sergiyev Posad, Russia
• Mianzhu, China
• Omu Aran, Nigeria
• Laoag, Philippines
• Teziutlán, México
• Tingjiang, China

In new street additions, Shouxian built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Sergiyev Posad built increasingly disconnected streets over time and Laoag fluctuated in its street-construction patterns. Looking at the full network, Sergiyev Posad and Laoag both became progressively more disconnected, while Shouxian grew more disconnected from 1975 through 1991-2005, then improved. Shouxian and Laoag have been converging in their street-network character since 1975.