Puyang in context: Street-network sprawl trends
Puyang in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Puyang plotted against Henan and China. The SNDi of new construction in Puyang 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, Puyang's incremental SNDi fell from 4.13 to 4.05 between 1991-2005 and 2006-2020. In terms of the aggregate network, Puyang ranked 124th out of 129 cities in Henan and 1537th out of 1843 in China as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 4.05
- Rank in China
- 1414th of 1843
- Rank in Henan
- 119th of 129
Entire Network (Aggregate)
- SNDi value
- 3.95
- Rank in China
- 1537th of 1843
- Rank in Henan
- 124th of 129
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
- Seville, Spain
- Palermo, Italy
- Kisangani, Democratic Republic of the Congo
- Donghe, China
- Winnipeg, Canada
- Dortmund, Germany
In new street additions, Puyang and Donghe both built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Seville fluctuated in its street-construction patterns. For the full network, Puyang and Donghe both grew more disconnected from 1975 through 1991-2005, then improved, while Seville became progressively more disconnected. Puyang and Donghe have been converging in their street-network character since 1975.