The level of street-network sprawl in new development in Istanbul followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Istanbul, we can consider three of its most populous cities: Istanbul, Arnavutköy and Silivri. Out of the three cities, Arnavutköy does not follow the same trend as the region. The level of street-network sprawl in new development in Arnavutköy rose steadily.

How do development practices in Istanbul fare in comparison to others in Turkey? Most recently in 2006-2020, street construction in Istanbul was the 63rd-most disconnected out of the 74 regions in Turkey. Its position in the ranks since 1975 has fallen; relative to other regions in Turkey, street construction in Istanbul has become more connected. Istanbul ranked 32nd in 1975, 57th in 1976-1990, 55th in 1991-2005 and 63rd in 2006-2020.

As of 2020, the city with the most disconnected street network in Istanbul is Silivri with an SNDi of 2.36, which is well-connected. Conversely, the most connected city is Arnavutköy with an SNDi of 1.88, which is very well-connected. See trends for these cities: Arnavutköy, Silivri

The level of street-network sprawl in the aggregate network in Istanbul rose steadily. To get a sense of how the aggregate street network has changed in Istanbul, we can consider three of its most populous cities: Istanbul, Arnavutköy and Silivri. Disconnectivity in the most populous cities in Istanbul follow the same region trend.

To date, Istanbul is the 45th-most disconnected out of the 74 regions in Turkey. Its position in the ranks since 1975 has fallen; relative to other regions in Turkey, the street network in Istanbul has become more connected. Istanbul ranked 32nd in 1975, 33rd in 1976-1990, 41st in 1991-2005 and 45th in 2006-2020.