Yixian in context: Street-network sprawl trends

Yixian in context

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
YixianHebei (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Yixian plotted against Hebei and China. The SNDi of new construction in Yixian rose steadily, compared to Hebei which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Yixian's incremental SNDi rose from 3.04 to 4.88 between 1991-2005 and 2006-2020. In terms of the aggregate network, Yixian ranked 67th out of 120 cities in Hebei and 1008th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
4.88
Rank in China
1613th of 1843
Rank in Hebei
108th of 120

Entire Network (Aggregate)

SNDi value
2.98
Rank in China
1008th of 1843
Rank in Hebei
67th of 120

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

What about similarly populated cities?

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
YixianFeodosiaNoginsk

In new street additions, Yixian and Noginsk both built increasingly disconnected streets over time, while Feodosia built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full street network, though, all three cities follow the same trend. Yixian and Feodosia have been growing further apart in their street-network character since 1975.