Haicheng in context: Street-network sprawl trends

Haicheng in context

2.433.64.2<19751976–19901991–20052006–2020SNDi of street additions
2.433.64.2<19751976–19901991–20052006–2020SNDi of entire street network
HaichengLiaoning (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Haicheng plotted against Liaoning and China. The SNDi of new construction in Haicheng peaked in 1991-2005, compared to Liaoning which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Haicheng's incremental SNDi fell from 3.29 to 2.46 between 1991-2005 and 2006-2020. In terms of the aggregate network, Haicheng ranked 26th out of 61 cities in Liaoning and 603rd out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.46
Rank in China
489th of 1843
Rank in Liaoning
19th of 61

Entire Network (Aggregate)

SNDi value
2.52
Rank in China
603rd of 1843
Rank in Liaoning
26th of 61

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
HaichengHuangyan DistrictNavsari

In new street additions, Haicheng built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Huangyan District fluctuated in its street-construction patterns and Navsari built increasingly disconnected streets over time. For the full network, Haicheng fluctuated in connectivity, while Huangyan District fluctuated in connectivity and Navsari became progressively more disconnected. Notably, Haicheng had a more sprawly network than Huangyan District in 1975 but the two have since reversed their relative ranking.