Trends
2.58
SNDi (2020)7,600 km
Total street network1975–2020
Analysis periodDisconnectedness burden of street construction in Chungcheongnam-do
▸ Hover over bars to see values
The chart above shows, for each construction period in the Chungcheongnam-do region, the SNDi of new street additions (bar height) and the volume added (bar width), so that bar area reflects the total disconnectedness burden of that period's construction. The 1991-2005 period contributed the greatest disconnectedness burden, with 3,100 km of street added at an SNDi of 2.55. Overall, the SNDi of new street additions in the region followed a zig-zag trend with an overall increase.
How have Chungcheongnam-do's street networks changed over time?
Most recent snapshot
Taking into account the entire (i.e. aggregate) street network in Chungcheongnam-do as of 2020, the overall level of street-network sprawl is 2.58, which is relatively well-connected.
Trends in street network construction
The SNDis of street construction for the respective time periods are 1.91, 3.21, 2.55 and 2.92. Disconnectivity in street construction in Chungcheongnam-do follows a zig-zag trend. In 1975, street construction was most disconnected, while construction was most connected in 1976-1990.
Quantity of street network construction
The street network in Chungcheongnam-do spans a total of 7,600 kilometers. It is dominated by roads constructed in 1991-2005. These roads have an SNDi of 2.55, which is relatively well-connected.
Effect on the aggregate network
New construction in each period adds to the total stock of streets, but does not change streets that have already been built. Therefore, it has a limited effect on the street network as a whole. The SNDis of the aggregate street network in the respective time periods are 1.91, 2.47, 2.49 and 2.58. Overall, the SNDi of the aggregate street network has risen: the street network in Chungcheongnam-do has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.56 points, but between 1991-2005 and 2006-2020, it rose by just 0.09.