Cheongan-dong in context: Street-network sprawl trends

Cheongan-dong in context

1.42.12.83.5<19751976–19901991–20052006–2020SNDi of street additions
1.42.12.83.5<19751976–19901991–20052006–2020SNDi of entire street network
Cheongan-dongBusan (Region)South Korea (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Cheongan-dong plotted against Busan and South Korea. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Cheongan-dong's incremental SNDi rose from 2.26 to 3.86 between 1991-2005 and 2006-2020. In terms of the aggregate network, Cheongan-dong ranked 2nd out of 2 cities in Busan and 42nd out of 49 in South Korea as of 2020.

New Street Additions (2006–2020)

SNDi value
3.86
Rank in South Korea
47th of 49
Rank in Busan
1st of 2

Entire Network (Aggregate)

SNDi value
2.63
Rank in South Korea
42nd of 49
Rank in Busan
2nd of 2

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

What about similarly populated cities?

2.12.83.5<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.5<19751976–19901991–20052006–2020SNDi of entire street network
Cheongan-dongRamenskoyeWhite Settlement

In new street additions, Cheongan-dong fluctuated in its street-construction patterns, while Ramenskoye built increasingly disconnected streets over time and White Settlement built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Ramenskoye and White Settlement both became progressively more disconnected, while Cheongan-dong fluctuated in connectivity. Cheongan-dong and Ramenskoye have been converging in their street-network character since 1975.