Comparisons
Djelfa vs. the other two most closely populated regions in Algeria: Constantine and Boumerdes
Djelfa in context: Street-network sprawl of new development
The level of street-network sprawl in new development in Djelfa peaked in 1976-1990. To get a sense of how street development has changed in Djelfa, we can consider three of its most populous cities: Djelfa, Messaad and Ain Oussara. Out of the three cities, Djelfa and Ain Oussara do not follow the same trend as the region. The level of street-network sprawl in new development in Djelfa followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Ain Oussara followed a zig-zag trend with an overall increase.
How do development practices in Djelfa fare in comparison to others in Algeria? Most recently in 2006-2020, street construction in Djelfa was the 7th-most disconnected out of the 45 regions in Algeria. Its position in the ranks since 1975 has risen; relative to other regions in Algeria, street construction in Djelfa has become more disconnected. Djelfa ranked 8th in 1975, 10th in 1976-1990, 12th in 1991-2005 and 7th in 2006-2020.
Djelfa in context: Aggregate street-network sprawl
As of 2020, the city with the most disconnected street network in Djelfa is Messaad with an SNDi of 1.65, which is very well-connected. Conversely, the most connected city is Ain Oussara with an SNDi of 1.25, which is very well-connected. See trends for these cities: Ain Oussara, Messaad
The level of street-network sprawl in the aggregate network in Djelfa peaked in 1976-1990. To get a sense of how the aggregate street network has changed in Djelfa, we can consider three of its most populous cities: Djelfa, Messaad and Ain Oussara. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Djelfa followed a zig-zag trend with an overall increase. The level of street-network sprawl in the aggregate network in Messaad peaked in 1991-2005. The level of street-network sprawl in the aggregate network in Ain Oussara rose steadily.
To date, Djelfa is the 11th-most disconnected out of the 45 regions in Algeria. Its position in the ranks since 1975 has fallen; relative to other regions in Algeria, the street network in Djelfa has become more connected. Djelfa ranked 8th in 1975, 10th in 1976-1990, 11th in 1991-2005 and 11th in 2006-2020.