Yidu in context: Street-network sprawl trends

Yidu 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
YiduHubei (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Yidu plotted against Hubei and China. The SNDi of new construction in Yidu 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, Yidu's incremental SNDi fell from 3.52 to 1.94 between 1991-2005 and 2006-2020. In terms of the aggregate network, Yidu ranked 27th out of 77 cities in Hubei and 698th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.94
Rank in China
221st of 1843
Rank in Hubei
9th of 77

Entire Network (Aggregate)

SNDi value
2.64
Rank in China
698th of 1843
Rank in Hubei
27th of 77

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
YiduSrinagarBen Guerir

In new street additions, Yidu and Srinagar both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Ben Guerir built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full street network, though, all three cities follow the same trend. Yidu and Ben Guerir have been growing further apart in their street-network character since 1975.