Kosan in context: Street-network sprawl trends

Kosan in context

45678<19751976–19901991–20052006–2020SNDi of street additions
45678<19751976–19901991–20052006–2020SNDi of entire street network
KosanKangwon-do (Region)North Korea (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Kosan plotted against Kangwŏn-do and North Korea. The SNDi of new construction in Kosan peaked in 1991-2005, compared to Kangwŏn-do which peaked in 1976-1990 and North Korea which peaked in 1976-1990. Most recently, Kosan's incremental SNDi fell from 8.2 to 4.35 between 1991-2005 and 2006-2020. In terms of the aggregate network, Kosan ranked 2nd out of 4 cities in Kangwŏn-do and 47th out of 92 in North Korea as of 2020.

New Street Additions (2006–2020)

SNDi value
4.35
Rank in North Korea
33rd of 92
Rank in Kangwŏn-do
1st of 4

Entire Network (Aggregate)

SNDi value
5.14
Rank in North Korea
47th of 92
Rank in Kangwŏn-do
2nd of 4

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
KosanPalaKafr al Hajj Shirbini

In new street additions, Pala and Kafr al Hajj Shirbini both built increasingly disconnected streets over time, while Kosan built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Pala and Kafr al Hajj Shirbini both became progressively more disconnected, while Kosan grew more disconnected from 1975 through 1991-2005, then improved. Kosan and Pala have been converging in their street-network character since 1975.