Shanghang in context: Street-network sprawl trends

Shanghang in context

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
ShanghangFujian (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Shanghang plotted against Fujian and China. The SNDi of new construction in Shanghang peaked in 1991-2005, compared to Fujian which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Shanghang's incremental SNDi fell from 3.65 to 2.34 between 1991-2005 and 2006-2020. In terms of the aggregate network, Shanghang ranked 24th out of 75 cities in Fujian and 858th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.34
Rank in China
417th of 1843
Rank in Fujian
8th of 75

Entire Network (Aggregate)

SNDi value
2.8
Rank in China
858th of 1843
Rank in Fujian
24th of 75

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

What about similarly populated cities?

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
ShanghangTshimbalangaTizayuca

While Tshimbalanga and Tizayuca both fluctuated in its street-construction patterns, Shanghang built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. Looking at the full network, Tshimbalanga and Tizayuca both fluctuated in connectivity, while Shanghang grew more disconnected from 1975 through 1991-2005, then improved. Shanghang and Tshimbalanga have been growing further apart in their street-network character since 1975.