Qi in context: Street-network sprawl trends

Qi 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
QiShanxi (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Qi plotted against Shanxi and China. The SNDi of new construction in Qi peaked in 1976-1990, compared to Shanxi which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Qi's incremental SNDi fell from 2.0 to 1.54 between 1991-2005 and 2006-2020. In terms of the aggregate network, Qi ranked 5th out of 80 cities in Shanxi and 220th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.54
Rank in China
79th of 1843
Rank in Shanxi
4th of 80

Entire Network (Aggregate)

SNDi value
1.98
Rank in China
220th of 1843
Rank in Shanxi
5th of 80

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

What about similarly populated cities?

1.42.12.8<19751976–19901991–20052006–2020SNDi of street additions
1.42.12.8<19751976–19901991–20052006–2020SNDi of entire street network
QiPergaminoTikrit

In new street additions, Qi built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Pergamino built increasingly disconnected streets over time and Tikrit fluctuated in its street-construction patterns. For the full network, Qi and Tikrit both grew more disconnected from 1975 through 1976-1990, then improved, while Pergamino became progressively more disconnected.