Lingao County in context: Street-network sprawl trends

Lingao County in context

33.544.5<19751976–19901991–20052006–2020SNDi of street additions
33.544.5<19751976–19901991–20052006–2020SNDi of entire street network
Lingao CountyHainan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Lingao County plotted against Hainan and China. The SNDi of new construction in Lingao County peaked in 1991-2005, 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, Lingao County's incremental SNDi fell from 4.21 to 3.87 between 1991-2005 and 2006-2020. In terms of the aggregate network, Lingao County ranked 7th out of 17 cities in Hainan and 1269th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.87
Rank in China
1337th of 1843
Rank in Hainan
10th of 17

Entire Network (Aggregate)

SNDi value
3.33
Rank in China
1269th of 1843
Rank in Hainan
7th of 17

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

What about similarly populated cities?

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
Lingao CountyTeraJamundi

In new street additions, Lingao County built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Téra built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Jamundí fluctuated in its street-construction patterns. For the full network, Lingao County became progressively more disconnected, while Téra became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards and Jamundí fluctuated in connectivity. Lingao County and Jamundí have been converging in their street-network character since 1975.