Islam Qala in context: Street-network sprawl trends

Islam Qala in context

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
Islam QalaHirat (Region)Afghanistan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Islam Qala plotted against Hirat and Afghanistan. The SNDi of new construction in Islam Qala followed a zig-zag trend with an overall decrease, compared to Hirat which was at its lowest in 1991-2005 and Afghanistan which followed a zig-zag trend with an overall increase. Most recently, Islam Qala's incremental SNDi fell from 3.57 to 2.54 between 1991-2005 and 2006-2020. In terms of the aggregate network, Islam Qala ranked 5th out of 8 cities in Hirat and 31st out of 73 in Afghanistan as of 2020.

New Street Additions (2006–2020)

SNDi value
2.54
Rank in Afghanistan
21st of 73
Rank in Hirat
3rd of 8

Entire Network (Aggregate)

SNDi value
3.78
Rank in Afghanistan
31st of 73
Rank in Hirat
5th of 8

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

What about similarly populated cities?

1.42.12.83.5<19751976–19901991–20052006–2020SNDi of street additions
1.42.12.83.5<19751976–19901991–20052006–2020SNDi of entire street network
Islam QalaIkotosRamla

In new street additions, Islam Qala fluctuated in its street-construction patterns, while Ikotos fluctuated in its street-construction patterns and Ramla built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Islam Qala grew more disconnected from 1975 through 1991-2005, then improved, while Ikotos fluctuated in connectivity and Ramla became progressively more disconnected.