Zahedan in context: Street-network sprawl trends

Zahedan in context

2.733.33.6<19751976–19901991–20052006–2020SNDi of street additions
2.733.33.6<19751976–19901991–20052006–2020SNDi of entire street network
ZahedanSistan and Baluchestan (Region)Iran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Zahedan plotted against Sistan and Baluchestan and Iran. The SNDi of new construction in Zahedan was at its lowest in 1976-1990, compared to Sistan and Baluchestan which was at its lowest in 1991-2005 and Iran which rose steadily. Most recently, Zahedan's incremental SNDi rose from 2.63 to 2.85 between 1991-2005 and 2006-2020. In terms of the aggregate network, Zahedan ranked 4th out of 7 cities in Sistan and Baluchestan and 75th out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
2.85
Rank in Iran
52nd of 169
Rank in Sistan and Baluchestan
3rd of 7

Entire Network (Aggregate)

SNDi value
2.85
Rank in Iran
75th of 169
Rank in Sistan and Baluchestan
4th of 7

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

What about similarly populated cities?

22.42.83.2<19751976–19901991–20052006–2020SNDi of street additions
22.42.83.2<19751976–19901991–20052006–2020SNDi of entire street network
ZahedanBi'r RubakYangjiang

While Bi'r Rubak and Yangjiang both fluctuated in its street-construction patterns, Zahedan built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns in new street additions. Looking at the full network, Bi'r Rubak and Yangjiang both fluctuated in connectivity, while Zahedan became progressively more connected. Zahedan and Yangjiang have been growing further apart in their street-network character since 1975.