Hong'an in context: Street-network sprawl trends

Hong'an in context

33.544.5<19751976–19901991–20052006–2020SNDi of street additions
33.544.5<19751976–19901991–20052006–2020SNDi of entire street network
Hong'anHubei (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Hong'an plotted against Hubei and China. The SNDi of new construction in Hong'an peaked in 1976-1990, compared to Hubei which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Hong'an's incremental SNDi fell from 3.38 to 3.18 between 1991-2005 and 2006-2020. In terms of the aggregate network, Hong'an ranked 52nd out of 77 cities in Hubei and 1225th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.18
Rank in China
992nd of 1843
Rank in Hubei
41st of 77

Entire Network (Aggregate)

SNDi value
3.26
Rank in China
1225th of 1843
Rank in Hubei
52nd of 77

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
Hong'anUdumalaipettaiBoxing

In new street additions, Hong'an and Boxing both built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Udumalaipettai fluctuated in its street-construction patterns. For the full network, Hong'an grew more disconnected from 1975 through 1991-2005, then improved, while Udumalaipettai became progressively more disconnected and Boxing grew more disconnected from 1975 through 1976-1990, then improved. Hong'an and Udumalaipettai have been converging in their street-network character since 1975.