Laishui in context: Street-network sprawl trends

Laishui in context

1234<19751976–19901991–20052006–2020SNDi of street additions
1234<19751976–19901991–20052006–2020SNDi of entire street network
LaishuiHebei (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Laishui plotted against Hebei and China. The SNDi of new construction in Laishui peaked in 1976-1990, compared to Hebei which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Laishui's incremental SNDi fell from 1.83 to 1.82 between 1991-2005 and 2006-2020. In terms of the aggregate network, Laishui ranked 2nd out of 120 cities in Hebei and 78th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.82
Rank in China
167th of 1843
Rank in Hebei
5th of 120

Entire Network (Aggregate)

SNDi value
1.65
Rank in China
78th of 1843
Rank in Hebei
2nd of 120

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

What about similarly populated cities?

1234<19751976–19901991–20052006–2020SNDi of street additions
1234<19751976–19901991–20052006–2020SNDi of entire street network
LaishuiBellinghamYeysk

In new street additions, Laishui built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Bellingham built increasingly disconnected streets over time and Yeysk built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Laishui and Bellingham both became progressively more disconnected, while Yeysk grew more disconnected from 1975 through 1991-2005, then improved. Notably, Laishui had a more connected network than Yeysk in 1975 but the two have since reversed their relative ranking.