Xiangtan in context: Street-network sprawl trends

Xiangtan in context

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
XiangtanHunan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Xiangtan plotted against Hunan and China. The SNDi of new construction in Xiangtan followed a zig-zag trend with an overall decrease, compared to Hunan which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Xiangtan's incremental SNDi fell from 3.99 to 3.08 between 1991-2005 and 2006-2020.

New Street Additions (2006–2020)

SNDi value
3.08

Entire Network (Aggregate)

SNDi value
3.79

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

234567<19751976–19901991–20052006–2020SNDi of street additions
234567<19751976–19901991–20052006–2020SNDi of entire street network
XiangtanGuercifHamju

In new street additions, Xiangtan fluctuated in its street-construction patterns, while Guercif fluctuated in its street-construction patterns and Hamju built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Xiangtan fluctuated in connectivity, while Guercif fluctuated in connectivity and Hamju grew more disconnected from 1975 through 1991-2005, then improved. Xiangtan and Guercif have been converging in their street-network character since 1975.