Trends
1.76
SNDi (2020)820 km
Total street network1975–2020
Analysis periodDisconnectedness burden of street construction in Cheonan-si
▸ Hover over bars to see values
The chart above shows, for each construction period in Cheonan-si, 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 330 km of street added at an SNDi of 1.8. Overall, the SNDi of new street additions followed a zig-zag trend with an overall increase.
Most recent snapshot
Taking into account the entire (i.e. aggregate) street network in Cheonan-si as of 2020, the overall level of street-network sprawl is 1.76, which is very well-connected.
Trends in street network construction
The SNDis of street construction for the respective time periods are 1.4, 2.31, 1.8 and 2.1. Disconnectivity in street construction in Cheonan-si 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 Cheonan-si spans a total of 820 kilometers. The period with the greatest volume of street construction was 1991-2005. These roads have an SNDi of 1.8, which is very 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 1.4, 1.57, 1.67 and 1.76. Overall, the SNDi of the aggregate street network has risen: the street network in Cheonan-si has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.17 points, but between 1991-2005 and 2006-2020, it rose by just 0.09.