Songmen in context: Street-network sprawl trends

Songmen in context

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
SongmenZhejiang (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Songmen plotted against Zhejiang and China. The SNDi of new construction in Songmen followed a zig-zag trend with an overall decrease, compared to Zhejiang which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Songmen's incremental SNDi fell from 2.87 to 2.7 between 1991-2005 and 2006-2020. In terms of the aggregate network, Songmen ranked 69th out of 116 cities in Zhejiang and 1089th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.7
Rank in China
661st of 1843
Rank in Zhejiang
44th of 116

Entire Network (Aggregate)

SNDi value
3.08
Rank in China
1089th of 1843
Rank in Zhejiang
69th of 116

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

What about similarly populated cities?

468<19751976–19901991–20052006–2020SNDi of street additions
468<19751976–19901991–20052006–2020SNDi of entire street network
SongmenApalitAlafaya

In new street additions, Songmen and Alafaya both fluctuated in its street-construction patterns, while Apalit built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Songmen became progressively more connected, while Apalit grew more disconnected from 1975 through 1991-2005, then improved and Alafaya became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Songmen and Apalit have been growing further apart in their street-network character since 1975.