Leiyang in context: Street-network sprawl trends

Leiyang in context

2.83.54.24.9<19751976–19901991–20052006–2020SNDi of street additions
2.83.54.24.9<19751976–19901991–20052006–2020SNDi of entire street network
LeiyangHunan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Leiyang plotted against Hunan and China. While Hunan and China both followed a zig-zag trend with an overall increase, Leiyang's new street additions followed a zig-zag trend with an overall increase. Most recently, Leiyang's incremental SNDi rose from 2.81 to 4.01 between 1991-2005 and 2006-2020. In terms of the aggregate network, Leiyang ranked 56th out of 89 cities in Hunan and 1251st out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
4.01
Rank in China
1404th of 1843
Rank in Hunan
73rd of 89

Entire Network (Aggregate)

SNDi value
3.3
Rank in China
1251st of 1843
Rank in Hunan
56th of 89

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

What about similarly populated cities?

1234<19751976–19901991–20052006–2020SNDi of street additions
1234<19751976–19901991–20052006–2020SNDi of entire street network
LeiyangKebkabiyaBettiah

In new street additions, Leiyang and Kebkabiya both fluctuated in its street-construction patterns, while Bettiah built increasingly disconnected streets over time. For the full network, Leiyang and Kebkabiya both fluctuated in connectivity, while Bettiah became progressively more disconnected. Notably, Leiyang had a more sprawly network than Bettiah in 1975 but the two have since reversed their relative ranking.