Ulsan in context: Street-network sprawl trends

Ulsan in context

1.622.42.8<19751976–19901991–20052006–2020SNDi of street additions
1.622.42.8<19751976–19901991–20052006–2020SNDi of entire street network
UlsanSouth Korea (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ulsan plotted against South Korea. Both Ulsan and South Korea follow the same trend. Most recently, Ulsan's incremental SNDi rose from 1.95 to 2.87 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ulsan ranked 24th out of 49 in South Korea as of 2020.

New Street Additions (2006–2020)

SNDi value
2.87
Rank in South Korea
29th of 49

Entire Network (Aggregate)

SNDi value
1.87
Rank in South Korea
24th of 49

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
UlsanBayamon [San Juan]Darbhanga

In new street additions, Ulsan fluctuated in its street-construction patterns, while Bayamón [San Juan] built increasingly disconnected streets from 1975 through 1991-2005, then improved and Darbhanga built increasingly disconnected streets over time. For the full street network, though, all three cities follow the same trend. Ulsan and Darbhanga have been growing further apart in their street-network character since 1975.