Polatlı in context: Street-network sprawl trends

Polatli in context

1.82.12.42.7<19751976–19901991–20052006–2020SNDi of street additions
1.82.12.42.7<19751976–19901991–20052006–2020SNDi of entire street network
PolatliAnkara (Region)Turkey (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Polatlı plotted against Ankara and Turkey. The SNDi of new construction in Polatlı rose steadily, compared to Ankara which followed a zig-zag trend with an overall increase and Turkey which followed a zig-zag trend with an overall increase. Most recently, Polatlı's incremental SNDi rose from 2.05 to 2.33 between 1991-2005 and 2006-2020. In terms of the aggregate network, Polatlı ranked 2nd out of 8 cities in Ankara and 78th out of 174 in Turkey as of 2020.

New Street Additions (2006–2020)

SNDi value
2.33
Rank in Turkey
93rd of 174
Rank in Ankara
7th of 8

Entire Network (Aggregate)

SNDi value
1.95
Rank in Turkey
78th of 174
Rank in Ankara
2nd of 8

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
PolatliMuarateweJinli

In new street additions, Polatlı built increasingly disconnected streets over time, while Muaratewe built increasingly disconnected streets from 1975 through 1991-2005, then improved and Jinli built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Polatlı and Muaratewe both became progressively more disconnected, while Jinli grew more disconnected from 1975 through 1976-1990, then improved.