Alxa Left Banner in context: Street-network sprawl trends

Alxa Left Banner in context

3.23.644.4<19751976–19901991–20052006–2020SNDi of street additions
3.23.644.4<19751976–19901991–20052006–2020SNDi of entire street network
Alxa Left BannerNei Mongol (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Alxa Left Banner plotted against Nei Mongol and China. The SNDi of new construction in Alxa Left Banner peaked in 1976-1990, compared to Nei Mongol which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Alxa Left Banner's incremental SNDi fell from 3.6 to 3.29 between 1991-2005 and 2006-2020. In terms of the aggregate network, Alxa Left Banner ranked 41st out of 43 cities in Nei Mongol and 1512th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.29
Rank in China
1042nd of 1843
Rank in Nei Mongol
25th of 43

Entire Network (Aggregate)

SNDi value
3.86
Rank in China
1512th of 1843
Rank in Nei Mongol
41st of 43

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

What about similarly populated cities?

246<19751976–19901991–20052006–2020SNDi of street additions
246<19751976–19901991–20052006–2020SNDi of entire street network
Alxa Left BannerHayqGeneral Roca

In new street additions, Alxa Left Banner built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Hayq built increasingly disconnected streets over time and General Roca fluctuated in its street-construction patterns. Looking at the full network, Hayq and General Roca both became progressively more disconnected, while Alxa Left Banner grew more disconnected from 1975 through 1976-1990, then improved. Alxa Left Banner and Hayq have been converging in their street-network character since 1975.