Xichuan in context: Street-network sprawl trends

Xichuan in context

33.544.5<19751976–19901991–20052006–2020SNDi of street additions
33.544.5<19751976–19901991–20052006–2020SNDi of entire street network
XichuanHenan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Xichuan plotted against Henan and China. The SNDi of new construction in Xichuan peaked in 1976-1990, compared to Henan which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Xichuan's incremental SNDi fell from 3.99 to 3.13 between 1991-2005 and 2006-2020. In terms of the aggregate network, Xichuan ranked 115th out of 129 cities in Henan and 1276th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.13
Rank in China
962nd of 1843
Rank in Henan
95th of 129

Entire Network (Aggregate)

SNDi value
3.35
Rank in China
1276th of 1843
Rank in Henan
115th of 129

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

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
XichuanKatiadiNew Haven

In new street additions, Xichuan built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Katiadi built increasingly disconnected streets over time and New Haven built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Katiadi and New Haven both became progressively more disconnected, while Xichuan grew more disconnected from 1975 through 1991-2005, then improved. Xichuan and Katiadi have been growing further apart in their street-network character since 1975.