Gaoyang in context: Street-network sprawl trends

Gaoyang 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
GaoyangHebei (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Gaoyang plotted against Hebei and China. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Gaoyang's incremental SNDi rose from 2.63 to 3.76 between 1991-2005 and 2006-2020. In terms of the aggregate network, Gaoyang ranked 39th out of 120 cities in Hebei and 655th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.76
Rank in China
1285th of 1843
Rank in Hebei
76th of 120

Entire Network (Aggregate)

SNDi value
2.59
Rank in China
655th of 1843
Rank in Hebei
39th of 120

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

What about similarly populated cities?

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
GaoyangNaritaReigate

While Narita and Reigate both built increasingly disconnected streets from 1975 through 1991-2005, then improved, Gaoyang fluctuated in its street-construction patterns in new street additions. For the full street network, though, all three cities follow the same trend. Notably, Gaoyang had a more connected network than Narita in 1975 but the two have since reversed their relative ranking.