Cheng'an in context: Street-network sprawl trends

Cheng'an in context

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
Cheng'anHebei (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Cheng'an plotted against Hebei and China. The SNDi of new construction in Cheng'an peaked in 1976-1990, compared to Hebei which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Cheng'an's incremental SNDi fell from 2.22 to 2.2 between 1991-2005 and 2006-2020. In terms of the aggregate network, Cheng'an ranked 16th out of 120 cities in Hebei and 345th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.2
Rank in China
337th of 1843
Rank in Hebei
13th of 120

Entire Network (Aggregate)

SNDi value
2.19
Rank in China
345th of 1843
Rank in Hebei
16th of 120

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

What about similarly populated cities?

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
Cheng'anElkParbatipur

In new street additions, Cheng'an built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Elk fluctuated in its street-construction patterns and Parbatipur built increasingly disconnected streets over time. For the full network, Cheng'an grew more disconnected from 1975 through 1991-2005, then improved, while Elk fluctuated in connectivity and Parbatipur became progressively more disconnected. Cheng'an and Elk have been growing further apart in their street-network character since 1975.