Onchon in context: Street-network sprawl trends

Onchon in context

3456<19751976–19901991–20052006–2020SNDi of street additions
3456<19751976–19901991–20052006–2020SNDi of entire street network
OnchonP'yongan-namdo (Region)North Korea (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Onchon plotted against P'yŏngan-namdo and North Korea. While P'yŏngan-namdo and North Korea both peaked in 1976-1990, Onchon's new street additions peaked in 1976-1990. Most recently, Onchon's incremental SNDi fell from 4.78 to 2.99 between 1991-2005 and 2006-2020. In terms of the aggregate network, Onchon ranked 5th out of 21 cities in P'yŏngan-namdo and 26th out of 92 in North Korea as of 2020.

New Street Additions (2006–2020)

SNDi value
2.99
Rank in North Korea
12th of 92
Rank in P'yŏngan-namdo
3rd of 21

Entire Network (Aggregate)

SNDi value
4.58
Rank in North Korea
26th of 92
Rank in P'yŏngan-namdo
5th of 21

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

What about similarly populated cities?

246810<19751976–19901991–20052006–2020SNDi of street additions
246810<19751976–19901991–20052006–2020SNDi of entire street network
OnchonSigmoSibiti

In new street additions, Onchon built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Sigmo built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns and Sibiti built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Onchon and Sibiti both grew more disconnected from 1975 through 1991-2005, then improved, while Sigmo became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Onchon and Sibiti have been converging in their street-network character since 1975.