Dafeng in context: Street-network sprawl trends

Dafeng in context

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
DafengJiangsu (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Dafeng plotted against Jiangsu and China. The SNDi of new construction in Dafeng peaked in 1976-1990, compared to Jiangsu which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Dafeng's incremental SNDi fell from 2.72 to 2.0 between 1991-2005 and 2006-2020. In terms of the aggregate network, Dafeng ranked 44th out of 101 cities in Jiangsu and 774th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.0
Rank in China
246th of 1843
Rank in Jiangsu
17th of 101

Entire Network (Aggregate)

SNDi value
2.72
Rank in China
774th of 1843
Rank in Jiangsu
44th of 101

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

What about similarly populated cities?

1.82.433.6<19751976–19901991–20052006–2020SNDi of street additions
1.82.433.6<19751976–19901991–20052006–2020SNDi of entire street network
DafengJampurSan Felix

In new street additions, Dafeng built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Jampur built increasingly disconnected streets from 1975 through 1991-2005, then improved and San Félix fluctuated in its street-construction patterns. Looking at the full network, Jampur and San Félix both became progressively more disconnected, while Dafeng grew more disconnected from 1975 through 1976-1990, then improved. Notably, Dafeng had a more sprawly network than Jampur in 1975 but the two have since reversed their relative ranking.