Qidong in context: Street-network sprawl trends

Qidong in context

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
QidongJiangsu (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Qidong plotted against Jiangsu and China. The SNDi of new construction in Qidong peaked in 1991-2005, compared to Jiangsu which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Qidong's incremental SNDi fell from 2.42 to 2.16 between 1991-2005 and 2006-2020. In terms of the aggregate network, Qidong ranked 24th out of 101 cities in Jiangsu as of 2020.

New Street Additions (2006–2020)

SNDi value
2.16
Rank in Jiangsu
20th of 101

Entire Network (Aggregate)

SNDi value
2.18
Rank in Jiangsu
24th of 101

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
QidongNovokuznetskAizawl

In new street additions, Qidong and Aizawl both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Novokuznetsk built increasingly disconnected streets over time. Looking at the full network, Novokuznetsk and Aizawl both became progressively more disconnected, while Qidong grew more disconnected from 1975 through 1991-2005, then improved.