Mile in context: Street-network sprawl trends

Mile 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
MileYunnan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Mile plotted against Yunnan and China. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Mile's incremental SNDi rose from 3.07 to 3.76 between 1991-2005 and 2006-2020. In terms of the aggregate network, Mile ranked 50th out of 78 cities in Yunnan and 1256th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.76
Rank in China
1289th of 1843
Rank in Yunnan
55th of 78

Entire Network (Aggregate)

SNDi value
3.31
Rank in China
1256th of 1843
Rank in Yunnan
50th of 78

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

What about similarly populated cities?

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
MileIgarraItapetininga

In new street additions, Mile fluctuated in its street-construction patterns, while Igarra built increasingly disconnected streets from 1975 through 1991-2005, then improved and Itapetininga built increasingly disconnected streets over time. Looking at the full network, Igarra and Itapetininga both became progressively more disconnected, while Mile fluctuated in connectivity. Mile and Igarra have been converging in their street-network character since 1975.