Trends
3.05
SNDi (2020)1,800 km
Total street network1975–2020
Analysis periodDisconnectedness burden of street construction in Northern
▸ Hover over bars to see values
The chart above shows, for each construction period in the Northern 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 1976-1990 period contributed the greatest disconnectedness burden, with 770 km of street added at an SNDi of 3.14. Overall, the SNDi of new street additions in the region followed a zig-zag trend with an overall increase.
How have Northern's street networks changed over time?
Most recent snapshot
Taking into account the entire (i.e. aggregate) street network in Northern as of 2020, the overall level of street-network sprawl is 3.05, which is moderately connected.
Trends in street network construction
The SNDis of street construction for the respective time periods are 2.54, 3.14, 2.87 and 3.67. Disconnectivity in street construction in Northern follows a zig-zag trend. In 1975, street construction was most disconnected, while construction was most connected in 2006-2020.
Quantity of street network construction
The street network in Northern spans a total of 1,800 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 3.14, which is moderately 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 2.54, 2.98, 2.95 and 3.05. Disconnectivity in Northern's street network follows a zig-zag trend. In 1975, the region was most disconnected; while it was most connected in 2006-2020.