Yibin in context: Street-network sprawl trends

Yibin 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
YibinSichuan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Yibin plotted against Sichuan and China. The SNDi of new construction in Yibin was at its lowest in 1976-1990, compared to Sichuan which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Yibin's incremental SNDi rose from 2.33 to 2.97 between 1991-2005 and 2006-2020. In terms of the aggregate network, Yibin ranked 28th out of 98 cities in Sichuan and 673rd out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.97
Rank in China
858th of 1843
Rank in Sichuan
42nd of 98

Entire Network (Aggregate)

SNDi value
2.61
Rank in China
673rd of 1843
Rank in Sichuan
28th of 98

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
YibinSanandajYuanlin City

In new street additions, Yibin built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Sanandaj built increasingly disconnected streets over time and Yuanlin City fluctuated in its street-construction patterns. Looking at the full network, Sanandaj and Yuanlin City both became progressively more disconnected, while Yibin became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Notably, Yibin had a more sprawly network than Sanandaj in 1975 but the two have since reversed their relative ranking.