Quốc Oai in context: Street-network sprawl trends

Quoc Oai in context

3.244.85.6<19751976–19901991–20052006–2020SNDi of street additions
3.244.85.6<19751976–19901991–20052006–2020SNDi of entire street network
Quoc OaiHa Noi (Region)Vietnam (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Quốc Oai plotted against Hà Nội and Vietnam. The SNDi of new construction in Quốc Oai fell steadily, compared to Hà Nội which peaked in 1991-2005 and Vietnam which rose steadily. Most recently, Quốc Oai's incremental SNDi fell from 4.18 to 3.32 between 1991-2005 and 2006-2020. In terms of the aggregate network, Quốc Oai ranked 2nd out of 9 cities in Hà Nội and 45th out of 126 in Vietnam as of 2020.

New Street Additions (2006–2020)

SNDi value
3.32
Rank in Vietnam
23rd of 126
Rank in Hà Nội
1st of 9

Entire Network (Aggregate)

SNDi value
4.01
Rank in Vietnam
45th of 126
Rank in Hà Nội
2nd of 9

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

What about similarly populated cities?

46810<19751976–19901991–20052006–2020SNDi of street additions
46810<19751976–19901991–20052006–2020SNDi of entire street network
Quoc OaiTorquayGapan

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