Changsha in context: Street-network sprawl trends
Changsha in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Changsha plotted against Hunan and China. The SNDi of new construction in Changsha peaked in 1991-2005, compared to Hunan which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Changsha's incremental SNDi fell from 3.99 to 3.68 between 1991-2005 and 2006-2020. In terms of the aggregate network, Changsha ranked 71st out of 89 cities in Hunan and 1493rd out of 1843 in China as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 3.68
- Rank in China
- 1239th of 1843
- Rank in Hunan
- 65th of 89
Entire Network (Aggregate)
- SNDi value
- 3.8
- Rank in China
- 1493rd of 1843
- Rank in Hunan
- 71st of 89
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
- Cape Town, South Africa
- Quanzhou, China
- Barcelona, Spain
- Tashkent, Uzbekistan
- Melbourne, Australia
- Dalian, China
Changsha, Cape Town, and Tashkent all built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street construction. Looking at the full network, Cape Town and Tashkent both became progressively more disconnected, while Changsha grew more disconnected from 1975 through 1991-2005, then improved. Changsha and Tashkent have been converging in their street-network character since 1975.