Trends
3.11
SNDi (2020)5,000 km
Total street network1975–2020
Analysis periodDisconnectedness burden of street construction in Zamfara
▸ Hover over bars to see values
The chart above shows, for each construction period in the Zamfara 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 1,800 km of street added at an SNDi of 3.33. Overall, the SNDi of new street additions in the region peaked in 1976-1990.
How have Zamfara's street networks changed over time?
Most recent snapshot
Taking into account the entire (i.e. aggregate) street network in Zamfara as of 2020, the overall level of street-network sprawl is 3.11, which is moderately connected.
Trends in street network construction
The SNDis of street construction for the respective time periods are 2.58, 3.51, 3.33 and 3.08. Street construction in Zamfara increased in disconnectivity initially but has since improved. The streets constructed in 1976-1990 were the most disconnected.
Quantity of street network construction
The street network in Zamfara spans a total of 5,000 kilometers. The period with the greatest volume of street construction was 1991-2005. These roads have an SNDi of 3.33, 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 2.58, 2.93, 3.12 and 3.11. The aggregate street network in Zamfara increased in disconnectivity initially,but the trend has turned around after 2000.