The level of street-network sprawl in new development in Aïn Defla peaked in 1976-1990. To get a sense of how street development has changed in Aïn Defla, we can consider three of its most populous cities: Khemis Miliana, Ain Defla and Miliana. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Khemis Miliana peaked in 1991-2005. The level of street-network sprawl in new development in Ain Defla rose steadily. The level of street-network sprawl in new development in Miliana peaked in 1991-2005.

How do development practices in Aïn Defla fare in comparison to others in Algeria? Most recently in 2006-2020, street construction in Aïn Defla was the 34th-most disconnected out of the 45 regions in Algeria. Its position in the ranks since 1975 has fallen; relative to other regions in Algeria, street construction in Aïn Defla has become more connected. Aïn Defla ranked 33rd in 1975, 33rd in 1976-1990, 34th in 1991-2005 and 34th in 2006-2020.

As of 2020, the city with the most disconnected street network in Aïn Defla is Miliana with an SNDi of 5.21, which is very sprawly. Conversely, the most connected city is Ain Defla with an SNDi of 1.67, which is very well-connected. See trends for these cities: Ain Defla, Miliana

The level of street-network sprawl in the aggregate network in Aïn Defla rose steadily. To get a sense of how the aggregate street network has changed in Aïn Defla, we can consider three of its most populous cities: Khemis Miliana, Ain Defla and Miliana. Out of the three cities, Khemis Miliana does not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Khemis Miliana peaked in 1991-2005.

To date, Aïn Defla is the 33rd-most disconnected out of the 45 regions in Algeria. Its position in the ranks since 1975 has not changed. Aïn Defla ranked 33rd in 1975, 33rd in 1976-1990, 33rd in 1991-2005 and 33rd in 2006-2020.