The level of street-network sprawl in new development in Sala ad-Din peaked in 1976-1990. To get a sense of how street development has changed in Sala ad-Din, we can consider three of its most populous cities: Al Mushahidah, Jafar Muhammad Ali and Samarra. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Al Mushahidah fell steadily. The level of street-network sprawl in new development in Jafar Muhammad Ali rose steadily. The level of street-network sprawl in new development in Samarra followed a zig-zag trend with an overall decrease.

As of 2020, the city with the most disconnected street network in Sala ad-Din is Al Mushahidah with an SNDi of 6.26, which is very sprawly. Conversely, the most connected city is بلد with an SNDi of 1.85, which is very well-connected. See trends for these cities: بلد, Al Mushahidah

The level of street-network sprawl in the aggregate network in Sala ad-Din fell steadily. To get a sense of how the aggregate street network has changed in Sala ad-Din, we can consider three of its most populous cities: Al Mushahidah, Jafar Muhammad Ali and Samarra. Out of the three cities, Jafar Muhammad Ali and Samarra do not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Jafar Muhammad Ali rose steadily. The level of street-network sprawl in the aggregate network in Samarra peaked in 1976-1990.