Sanya in context: Street-network sprawl trends

Sanya 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
SanyaHainan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Sanya plotted against Hainan and China. The SNDi of new construction in Sanya rose steadily, compared to Hainan which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Sanya's incremental SNDi rose from 3.84 to 4.81 between 1991-2005 and 2006-2020. In terms of the aggregate network, Sanya ranked 12th out of 17 cities in Hainan and 1444th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
4.81
Rank in China
1593rd of 1843
Rank in Hainan
14th of 17

Entire Network (Aggregate)

SNDi value
3.66
Rank in China
1444th of 1843
Rank in Hainan
12th of 17

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

What about similarly populated cities?

3456<19751976–19901991–20052006–2020SNDi of street additions
3456<19751976–19901991–20052006–2020SNDi of entire street network
SanyaStocktonSandakan

While Stockton and Sandakan both built increasingly disconnected streets from 1975 through 1991-2005, then improved, Sanya built increasingly disconnected streets over time in new street additions. For the full network, Sanya and Stockton both became progressively more disconnected, while Sandakan grew more disconnected from 1975 through 1991-2005, then improved. Sanya and Stockton have been converging in their street-network character since 1975.