Shadegan in context: Street-network sprawl trends

Shadegan in context

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
ShadeganKhuzestan (Region)Iran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Shadegan plotted against Khuzestan and Iran. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Shadegan's incremental SNDi rose from 2.63 to 5.28 between 1991-2005 and 2006-2020. In terms of the aggregate network, Shadegan ranked 6th out of 15 cities in Khuzestan and 43rd out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
5.28
Rank in Iran
156th of 169
Rank in Khuzestan
15th of 15

Entire Network (Aggregate)

SNDi value
2.51
Rank in Iran
43rd of 169
Rank in Khuzestan
6th of 15

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

What about similarly populated cities?

246810<19751976–19901991–20052006–2020SNDi of street additions
246810<19751976–19901991–20052006–2020SNDi of entire street network
ShadeganPolashbariNagina

In new street additions, Shadegan built increasingly disconnected streets over time, while Polashbari fluctuated in its street-construction patterns and Nagina built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Shadegan became progressively more disconnected, while Polashbari became progressively more disconnected and Nagina grew more disconnected from 1975 through 1991-2005, then improved. Notably, Shadegan had a more sprawly network than Polashbari in 1975 but the two have since reversed their relative ranking.