Tianchang in context: Street-network sprawl trends

Tianchang in context

2.43.24<19751976–19901991–20052006–2020SNDi of street additions
2.43.24<19751976–19901991–20052006–2020SNDi of entire street network
TianchangAnhui (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tianchang plotted against Anhui and China. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Tianchang's incremental SNDi rose from 1.98 to 3.44 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tianchang ranked 47th out of 74 cities in Anhui and 908th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.44
Rank in China
1128th of 1843
Rank in Anhui
57th of 74

Entire Network (Aggregate)

SNDi value
2.86
Rank in China
908th of 1843
Rank in Anhui
47th of 74

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

What about similarly populated cities?

1.82.433.64.2<19751976–19901991–20052006–2020SNDi of street additions
1.82.433.64.2<19751976–19901991–20052006–2020SNDi of entire street network
TianchangKairanaGohana

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