Nanpu 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 Nanpu plotted against Henan and China. The SNDi of new construction in Nanpu peaked in 1976-1990, compared to Henan which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Nanpu's incremental SNDi fell from 2.86 to 1.88 between 1991-2005 and 2006-2020. In terms of the aggregate network, Nanpu ranked 50th out of 129 cities in Henan and 361st 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?

• Lufeng, China
• Bhangura, Bangladesh
• Fugou, China
• Сафоново, Russia
• Brindisi, Italy
• Buri Ram, Thailand

In new street additions, Nanpu and Lufeng both built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Сафоново built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Nanpu grew more disconnected from 1975 through 1991-2005, then improved, while Lufeng grew more disconnected from 1975 through 1976-1990, then improved and Сафоново became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Nanpu and Lufeng have been converging in their street-network character since 1975.