Tianmen in context: Street-network sprawl trends

Tianmen 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
TianmenHubei (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tianmen plotted against Hubei and China. The SNDi of new construction in Tianmen peaked in 1991-2005, compared to Hubei which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Tianmen's incremental SNDi fell from 4.04 to 3.63 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tianmen ranked 62nd out of 77 cities in Hubei and 1413th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.63
Rank in China
1213th of 1843
Rank in Hubei
55th of 77

Entire Network (Aggregate)

SNDi value
3.58
Rank in China
1413th of 1843
Rank in Hubei
62nd of 77

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

What about similarly populated cities?

246<19751976–19901991–20052006–2020SNDi of street additions
246<19751976–19901991–20052006–2020SNDi of entire street network
TianmenKasGolapganj

In new street additions, Tianmen and Golapganj both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Kas built increasingly disconnected streets over time. For the full network, Tianmen and Kas both became progressively more disconnected, while Golapganj grew more disconnected from 1975 through 1991-2005, then improved. Tianmen and Kas have been growing further apart in their street-network character since 1975.