Silivri in context: Street-network sprawl trends

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Silivri plotted against Istanbul and Turkey. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Silivri's incremental SNDi rose from 2.4 to 3.08 between 1991-2005 and 2006-2020. In terms of the aggregate network, Silivri ranked 3rd out of 3 cities in Istanbul and 118th out of 174 in Turkey as of 2020.

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

• Hassi El Garra, Algeria
• Balarampur, India
• Hillat Ash Shekh Mustafa al Fadni, Sudan
• Chandauli, India
• Behea, India
• Gushiegu, Ghana

In new street additions, Silivri fluctuated in its street-construction patterns, while Hassi El Garra built increasingly connected streets over time and Chandauli built increasingly disconnected streets over time. For the full network, Silivri and Chandauli both became progressively more disconnected, while Hassi El Garra became progressively more connected. Silivri and Hassi El Garra have been converging in their street-network character since 1975.