Shaoyang in context: Street-network sprawl trends

Shaoyang in context

2.83.54.24.9<19751976–19901991–20052006–2020SNDi of street additions
2.83.54.24.9<19751976–19901991–20052006–2020SNDi of entire street network
ShaoyangHunan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Shaoyang plotted against Hunan and China. The SNDi of new construction in Shaoyang peaked in 1976-1990, compared to Hunan which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Shaoyang's incremental SNDi fell from 4.33 to 2.94 between 1991-2005 and 2006-2020.

New Street Additions (2006–2020)

SNDi value
2.94

Entire Network (Aggregate)

SNDi value
3.27

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

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
ShaoyangStamfordTchin-Tabaraden

In new street additions, Shaoyang built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Stamford built increasingly disconnected streets over time and Tchin-Tabaraden built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Stamford and Tchin-Tabaraden both became progressively more disconnected, while Shaoyang grew more disconnected from 1975 through 1991-2005, then improved. Notably, Shaoyang had a more sprawly network than Tchin-Tabaraden in 1975 but the two have since reversed their relative ranking.