Piranshahr in context: Street-network sprawl trends

Piranshahr in context

22.533.54<19751976–19901991–20052006–2020SNDi of street additions
22.533.54<19751976–19901991–20052006–2020SNDi of entire street network
PiranshahrWest Azarbaijan (Region)Iran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Piranshahr plotted against West Azarbaijan and Iran. While West Azarbaijan and Iran both rose steadily, Piranshahr's new street additions rose steadily. Most recently, Piranshahr's incremental SNDi rose from 3.28 to 3.32 between 1991-2005 and 2006-2020. In terms of the aggregate network, Piranshahr ranked 9th out of 11 cities in West Azarbaijan and 100th out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
3.32
Rank in Iran
82nd of 169
Rank in West Azarbaijan
6th of 11

Entire Network (Aggregate)

SNDi value
3.15
Rank in Iran
100th of 169
Rank in West Azarbaijan
9th of 11

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

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
PiranshahrGohSainthia

Piranshahr, Goh, and Sainthia all built increasingly disconnected streets over time in new street construction. The same pattern holds for the full street network. Piranshahr and Sainthia have been converging in their street-network character since 1975.