Haizijie in context: Street-network sprawl trends

Haizijie in context

3.544.55<19751976–19901991–20052006–2020SNDi of street additions
3.544.55<19751976–19901991–20052006–2020SNDi of entire street network
HaizijieGuizhou (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Haizijie plotted against Guizhou and China. The SNDi of new construction in Haizijie followed a zig-zag trend with an overall decrease, compared to Guizhou which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Haizijie's incremental SNDi fell from 3.96 to 3.28 between 1991-2005 and 2006-2020. In terms of the aggregate network, Haizijie ranked 28th out of 41 cities in Guizhou and 1427th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.28
Rank in China
1037th of 1843
Rank in Guizhou
20th of 41

Entire Network (Aggregate)

SNDi value
3.61
Rank in China
1427th of 1843
Rank in Guizhou
28th of 41

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
HaizijieNandanDantu District

In new street additions, Haizijie fluctuated in its street-construction patterns, while Nandan built increasingly disconnected streets over time and Dantu District fluctuated in its street-construction patterns. For the full network, Haizijie fluctuated in connectivity, while Nandan became progressively more disconnected and Dantu District became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Notably, Haizijie had a more connected network than Dantu District in 1975 but the two have since reversed their relative ranking.