Tongrim in context: Street-network sprawl trends

Tongrim in context

4567<19751976–19901991–20052006–2020SNDi of street additions
4567<19751976–19901991–20052006–2020SNDi of entire street network
TongrimP'yongan-bukto (Region)North Korea (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tongrim plotted against P'yŏngan-bukto and North Korea. While P'yŏngan-bukto and North Korea both peaked in 1976-1990, Tongrim's new street additions peaked in 1976-1990. Most recently, Tongrim's incremental SNDi fell from 5.67 to 5.6 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tongrim ranked 10th out of 16 cities in P'yŏngan-bukto and 62nd out of 92 in North Korea as of 2020.

New Street Additions (2006–2020)

SNDi value
5.6
Rank in North Korea
51st of 92
Rank in P'yŏngan-bukto
9th of 16

Entire Network (Aggregate)

SNDi value
5.69
Rank in North Korea
62nd of 92
Rank in P'yŏngan-bukto
10th of 16

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

What about similarly populated cities?

3456<19751976–19901991–20052006–2020SNDi of street additions
3456<19751976–19901991–20052006–2020SNDi of entire street network
TongrimJaigaonChalco

In new street additions, Tongrim and Chalco both built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Jaigaon built increasingly disconnected streets over time. For the full network, Tongrim and Jaigaon both became progressively more disconnected, while Chalco grew more disconnected from 1975 through 1976-1990, then improved. Notably, Tongrim had a more connected network than Jaigaon in 1975 but the two have since reversed their relative ranking.