Bam in context: Street-network sprawl trends

Bam in context

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
BamKerman (Region)Iran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Bam plotted against Kerman and Iran. The SNDi of new construction in Bam was at its lowest in 1976-1990, compared to Kerman which fell steadily and Iran which rose steadily. Most recently, Bam's incremental SNDi rose from 1.51 to 1.62 between 1991-2005 and 2006-2020. In terms of the aggregate network, Bam ranked 1st out of 14 cities in Kerman and 1st out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
1.62
Rank in Iran
2nd of 169
Rank in Kerman
2nd of 14

Entire Network (Aggregate)

SNDi value
1.65
Rank in Iran
1st of 169
Rank in Kerman
1st of 14

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

What about similarly populated cities?

1.21.82.43<19751976–19901991–20052006–2020SNDi of street additions
1.21.82.43<19751976–19901991–20052006–2020SNDi of entire street network
BamNassarawan EggonTorbat-e Jam

In new street additions, Bam and Nassarawan Eggon both built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Torbat-e Jam built increasingly connected streets over time. For the full network, Bam and Torbat-e Jam both became progressively more connected, while Nassarawan Eggon became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Bam and Nassarawan Eggon have been converging in their street-network character since 1975.