Trends
2.78
SNDi (2020)39 km
Total street network1975–2020
Analysis periodDisconnectedness burden of street construction in Daozhen
▸ Hover over bars to see values
The chart above shows, for each construction period in Daozhen, 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 1976-1990 period contributed the greatest disconnectedness burden, with 10 km of street added at an SNDi of 11.47. Overall, the SNDi of new street additions followed a zig-zag trend with an overall decrease.
Most recent snapshot
Taking into account the entire (i.e. aggregate) street network in Daozhen as of 2020, the overall level of street-network sprawl is 2.78, which is relatively well-connected.
Trends in street network construction
The SNDis of street construction for the respective time periods are 7.26, 11.47, 1.15 and 1.97. Disconnectivity in street construction in Daozhen follows a zig-zag trend. In 1991-2005, street construction was most disconnected, while construction was most connected in 1976-1990.
Quantity of street network construction
The street network in Daozhen spans a total of 39 kilometers. It is dominated by roads constructed in 2006-2020. These roads have an SNDi of 1.97, which is 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 7.26, 10.09, 3.73 and 2.78. The aggregate street network in Daozhen increased in disconnectivity initially,but the trend has turned around after 1990.