Dehdasht in context: Street-network sprawl trends

Dehdasht in context

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
DehdashtKohgiluyeh and Buyer Ahmad (Region)Iran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Dehdasht plotted against Kohgiluyeh and Buyer Ahmad and Iran. The SNDi of new construction in Dehdasht was at its lowest in 1976-1990, compared to Kohgiluyeh and Buyer Ahmad which was at its lowest in 1991-2005 and Iran which rose steadily. Most recently, Dehdasht's incremental SNDi rose from 1.96 to 2.1 between 1991-2005 and 2006-2020. In terms of the aggregate network, Dehdasht ranked 1st out of 4 cities in Kohgiluyeh and Buyer Ahmad and 9th out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
2.1
Rank in Iran
9th of 169
Rank in Kohgiluyeh and Buyer Ahmad
1st of 4

Entire Network (Aggregate)

SNDi value
2.03
Rank in Iran
9th of 169
Rank in Kohgiluyeh and Buyer Ahmad
1st of 4

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

What about similarly populated cities?

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
DehdashtGurlanLoughborough

In new street additions, Dehdasht built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Gurlan built increasingly disconnected streets over time and Loughborough built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Gurlan and Loughborough both became progressively more disconnected, while Dehdasht became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Dehdasht and Gurlan have been growing further apart in their street-network character since 1975.