Yanchi in context: Street-network sprawl trends

Yanchi 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
YanchiNingxia Hui (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Yanchi plotted against Ningxia Hui and China. While Ningxia Hui and China both followed a zig-zag trend with an overall increase, Yanchi's new street additions followed a zig-zag trend with an overall increase. Most recently, Yanchi's incremental SNDi rose from 1.92 to 3.03 between 1991-2005 and 2006-2020. In terms of the aggregate network, Yanchi ranked 10th out of 15 cities in Ningxia Hui and 502nd out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.03
Rank in China
901st of 1843
Rank in Ningxia Hui
12th of 15

Entire Network (Aggregate)

SNDi value
2.39
Rank in China
502nd of 1843
Rank in Ningxia Hui
10th of 15

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
YanchiVila JardimBarharwa Khurd

In new street additions, Yanchi and Vila Jardim both fluctuated in its street-construction patterns, while Barharwa Khurd built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Yanchi became progressively more disconnected, while Vila Jardim fluctuated in connectivity and Barharwa Khurd became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Yanchi and Vila Jardim have been converging in their street-network character since 1975.