Hejian in context: Street-network sprawl trends

Hejian 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
HejianHebei (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Hejian plotted against Hebei and China. The SNDi of new construction in Hejian peaked in 1991-2005, 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, Hejian's incremental SNDi fell from 2.94 to 2.55 between 1991-2005 and 2006-2020. In terms of the aggregate network, Hejian ranked 47th out of 120 cities in Hebei and 784th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.55
Rank in China
550th of 1843
Rank in Hebei
27th of 120

Entire Network (Aggregate)

SNDi value
2.73
Rank in China
784th of 1843
Rank in Hebei
47th of 120

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

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
HejianBalasoreHeidelberg

In new street additions, Hejian and Heidelberg both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Balasore built increasingly disconnected streets over time. Looking at the full network, Balasore and Heidelberg both became progressively more disconnected, while Hejian grew more disconnected from 1975 through 1991-2005, then improved. Notably, Hejian had a more sprawly network than Balasore in 1975 but the two have since reversed their relative ranking.