Lingling in context: Street-network sprawl trends

Lingling in context

34567<19751976–19901991–20052006–2020SNDi of street additions
34567<19751976–19901991–20052006–2020SNDi of entire street network
LinglingHunan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Lingling plotted against Hunan and China. The SNDi of new construction in Lingling peaked in 1976-1990, compared to Hunan which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Lingling's incremental SNDi fell from 4.2 to 2.96 between 1991-2005 and 2006-2020. In terms of the aggregate network, Lingling ranked 82nd out of 89 cities in Hunan and 1651st out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.96
Rank in China
854th of 1843
Rank in Hunan
47th of 89

Entire Network (Aggregate)

SNDi value
4.46
Rank in China
1651st of 1843
Rank in Hunan
82nd of 89

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

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
LinglingMarsa MatruhMeki

While Marsa Matruh and Meki both fluctuated in its street-construction patterns, Lingling built increasingly disconnected streets from 1975 through 1976-1990, then improved in new street additions. For the full network, Lingling grew more disconnected from 1975 through 1976-1990, then improved, while Marsa Matruh became progressively more disconnected and Meki fluctuated in connectivity. Lingling and Marsa Matruh have been growing further apart in their street-network character since 1975.