Yanshan in context: Street-network sprawl trends

Yanshan in context

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
YanshanYunnan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Yanshan plotted against Yunnan and China. The SNDi of new construction in Yanshan was at its lowest in 1976-1990, compared to Yunnan which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Yanshan's incremental SNDi rose from 1.46 to 1.61 between 1991-2005 and 2006-2020. In terms of the aggregate network, Yanshan ranked 1st out of 78 cities in Yunnan and 43rd out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.61
Rank in China
95th of 1843
Rank in Yunnan
2nd of 78

Entire Network (Aggregate)

SNDi value
1.48
Rank in China
43rd of 1843
Rank in Yunnan
1st of 78

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

What about similarly populated cities?

1.522.53<19751976–19901991–20052006–2020SNDi of street additions
1.522.53<19751976–19901991–20052006–2020SNDi of entire street network
YanshanMahalapyeMartil

While Mahalapye and Martil both fluctuated in its street-construction patterns, Yanshan built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns in new street additions. For the full network, Yanshan became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards, while Mahalapye fluctuated in connectivity and Martil became progressively more disconnected. Yanshan and Mahalapye have been converging in their street-network character since 1975.