T'aet'an-eup in context: Street-network sprawl trends

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with T'aet'an-eup plotted against Hwanghae-namdo and North Korea. The SNDi of new construction in T'aet'an-eup rose steadily, compared to Hwanghae-namdo which followed a zig-zag trend with an overall increase and North Korea which peaked in 1976-1990. Most recently, T'aet'an-eup's incremental SNDi rose from 4.45 to 5.29 between 1991-2005 and 2006-2020. In terms of the aggregate network, T'aet'an-eup ranked 3rd out of 15 cities in Hwanghae-namdo and 4th out of 92 in North Korea as of 2020.

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

What about similarly populated cities?

• Jammalamadugu, India
• Chagalnaiya, Bangladesh
• Cerro de Pasco, Peru
• Batusangkar, Indonesia
• Ekenobizi, Nigeria
• Dundet, Egypt

In new street additions, T'aet'an-eup built increasingly disconnected streets over time, while Jammalamadugu built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Batusangkar built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, T'aet'an-eup and Batusangkar both became progressively more disconnected, while Jammalamadugu became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards.