Ji'an in context: Street-network sprawl trends
Ji'an in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ji'an plotted against Jiangxi and China. The SNDi of new construction in Ji'an peaked in 1976-1990, compared to Jiangxi which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Ji'an's incremental SNDi fell from 2.21 to 1.73 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ji'an ranked 8th out of 82 cities in Jiangxi as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 1.73
- Rank in Jiangxi
- 7th of 82
Entire Network (Aggregate)
- SNDi value
- 2.04
- Rank in Jiangxi
- 8th of 82
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
In new street additions, Ji'an built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Zouping built increasingly disconnected streets from 1975 through 1991-2005, then improved and Owo fluctuated in its street-construction patterns. Looking at the full network, Zouping and Owo both became progressively more disconnected, while Ji'an grew more disconnected from 1975 through 1976-1990, then improved. Notably, Ji'an had a more sprawly network than Zouping in 1975 but the two have since reversed their relative ranking.