Cheonan-si in context: Street-network sprawl trends

Cheonan-si in context

1.21.82.43<19751976–19901991–20052006–2020SNDi of street additions
1.21.82.43<19751976–19901991–20052006–2020SNDi of entire street network
Cheonan-siChungcheongnam-do (Region)South Korea (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Cheonan-si plotted against Chungcheongnam-do and South Korea. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Cheonan-si's incremental SNDi rose from 1.8 to 2.1 between 1991-2005 and 2006-2020. In terms of the aggregate network, Cheonan-si ranked 2nd out of 2 cities in Chungcheongnam-do and 18th out of 49 in South Korea as of 2020.

New Street Additions (2006–2020)

SNDi value
2.1
Rank in South Korea
8th of 49
Rank in Chungcheongnam-do
2nd of 2

Entire Network (Aggregate)

SNDi value
1.76
Rank in South Korea
18th of 49
Rank in Chungcheongnam-do
2nd of 2

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

What about similarly populated cities?

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
Cheonan-siPalakkadChenzhou

In new street additions, Cheonan-si and Chenzhou both fluctuated in its street-construction patterns, while Palakkad built increasingly disconnected streets over time. For the full street network, though, all three cities follow the same trend. Cheonan-si and Palakkad have been growing further apart in their street-network character since 1975.