Lhasa in context: Street-network sprawl trends

Lhasa in context

3456<19751976–19901991–20052006–2020SNDi of street additions
3456<19751976–19901991–20052006–2020SNDi of entire street network
LhasaXizang (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Lhasa plotted against Xizang and China. The SNDi of new construction in Lhasa was at its lowest in 1991-2005, compared to Xizang which fell steadily and China which followed a zig-zag trend with an overall increase. Most recently, Lhasa's incremental SNDi rose from 4.79 to 4.82 between 1991-2005 and 2006-2020. In terms of the aggregate network, Lhasa ranked 3rd out of 3 cities in Xizang and 1785th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
4.82
Rank in China
1596th of 1843
Rank in Xizang
3rd of 3

Entire Network (Aggregate)

SNDi value
5.81
Rank in China
1785th of 1843
Rank in Xizang
3rd of 3

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
LhasaPowaySihong County

In new street additions, Lhasa built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns, while Poway built increasingly disconnected streets from 1975 through 1991-2005, then improved and Sihong County built increasingly disconnected streets over time. For the full network, Lhasa became progressively more connected, while Poway grew more disconnected from 1975 through 1991-2005, then improved and Sihong County became progressively more disconnected. Lhasa and Poway have been converging in their street-network character since 1975.