Sariwon in context: Street-network sprawl trends

Sariwon in context

3456<19751976–19901991–20052006–2020SNDi of street additions
3456<19751976–19901991–20052006–2020SNDi of entire street network
SariwonHwanghae-bukto (Region)North Korea (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Sariwon plotted against Hwanghae-bukto and North Korea. The SNDi of new construction in Sariwon peaked in 1991-2005, compared to Hwanghae-bukto which followed a zig-zag trend with an overall increase and North Korea which peaked in 1976-1990. Most recently, Sariwon's incremental SNDi fell from 4.64 to 3.07 between 1991-2005 and 2006-2020. In terms of the aggregate network, Sariwon ranked 1st out of 6 cities in Hwanghae-bukto and 14th out of 92 in North Korea as of 2020.

New Street Additions (2006–2020)

SNDi value
3.07
Rank in North Korea
15th of 92
Rank in Hwanghae-bukto
1st of 6

Entire Network (Aggregate)

SNDi value
4.02
Rank in North Korea
14th of 92
Rank in Hwanghae-bukto
1st of 6

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

What about similarly populated cities?

3.54.24.9<19751976–19901991–20052006–2020SNDi of street additions
3.54.24.9<19751976–19901991–20052006–2020SNDi of entire street network
SariwonSanhurFuqing

In new street additions, Sariwon and Sanhur both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Fuqing built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Sariwon and Fuqing both grew more disconnected from 1975 through 1991-2005, then improved, while Sanhur became progressively more disconnected. Notably, Sariwon had a more sprawly network than Sanhur in 1975 but the two have since reversed their relative ranking.