Shiyan in context: Street-network sprawl trends

Shiyan in context

345678<19751976–19901991–20052006–2020SNDi of street additions
345678<19751976–19901991–20052006–2020SNDi of entire street network
ShiyanHubei (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Shiyan plotted against Hubei and China. The SNDi of new construction in Shiyan peaked in 1976-1990, compared to Hubei which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Shiyan's incremental SNDi fell from 6.29 to 4.91 between 1991-2005 and 2006-2020. In terms of the aggregate network, Shiyan ranked 77th out of 77 cities in Hubei and 1797th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
4.91
Rank in China
1619th of 1843
Rank in Hubei
75th of 77

Entire Network (Aggregate)

SNDi value
6.21
Rank in China
1797th of 1843
Rank in Hubei
77th of 77

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

What about similarly populated cities?

345678<19751976–19901991–20052006–2020SNDi of street additions
345678<19751976–19901991–20052006–2020SNDi of entire street network
ShiyanRamallahFarrukhabad

While Ramallah and Farrukhabad both fluctuated in its street-construction patterns, Shiyan built increasingly disconnected streets from 1975 through 1976-1990, then improved in new street additions. Looking at the full network, Ramallah and Farrukhabad both became progressively more disconnected, while Shiyan grew more disconnected from 1975 through 1976-1990, then improved. Shiyan and Ramallah have been converging in their street-network character since 1975.