Zongyang in context: Street-network sprawl trends

Zongyang 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
ZongyangAnhui (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Zongyang plotted against Anhui and China. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Zongyang's incremental SNDi rose from 2.1 to 2.28 between 1991-2005 and 2006-2020. In terms of the aggregate network, Zongyang ranked 24th out of 74 cities in Anhui and 347th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.28
Rank in China
388th of 1843
Rank in Anhui
24th of 74

Entire Network (Aggregate)

SNDi value
2.19
Rank in China
347th of 1843
Rank in Anhui
24th of 74

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

What about similarly populated cities?

36912<19751976–19901991–20052006–2020SNDi of street additions
36912<19751976–19901991–20052006–2020SNDi of entire street network
ZongyangLa SpeziaPanzhou

In new street additions, Zongyang fluctuated in its street-construction patterns, while La Spezia built increasingly disconnected streets from 1975 through 1991-2005, then improved and Panzhou built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Zongyang and La Spezia both became progressively more disconnected, while Panzhou became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Zongyang and Panzhou have been converging in their street-network character since 1975.