Gugang in context: Street-network sprawl trends

Gugang 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
GugangHunan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Gugang plotted against Hunan and China. The SNDi of new construction in Gugang was at its lowest 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, Gugang's incremental SNDi rose from 2.42 to 2.48 between 1991-2005 and 2006-2020. In terms of the aggregate network, Gugang ranked 32nd out of 89 cities in Hunan and 652nd out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.48
Rank in China
501st of 1843
Rank in Hunan
32nd of 89

Entire Network (Aggregate)

SNDi value
2.59
Rank in China
652nd of 1843
Rank in Hunan
32nd of 89

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

What about similarly populated cities?

1.82.433.6<19751976–19901991–20052006–2020SNDi of street additions
1.82.433.6<19751976–19901991–20052006–2020SNDi of entire street network
GugangNiono-SocouraBariadi

In new street additions, Gugang built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns, while Niono-Socoura built increasingly disconnected streets from 1975 through 1991-2005, then improved and Bariadi built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Gugang became progressively more connected, while Niono-Socoura became progressively more disconnected and Bariadi became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Notably, Gugang had a more sprawly network than Niono-Socoura in 1975 but the two have since reversed their relative ranking.