Babol in context: Street-network sprawl trends

Babol in context

345678<19751976–19901991–20052006–2020SNDi of street additions
345678<19751976–19901991–20052006–2020SNDi of entire street network
BabolMazandaran (Region)Iran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Babol plotted against Mazandaran and Iran. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Babol's incremental SNDi rose from 5.99 to 6.35 between 1991-2005 and 2006-2020. In terms of the aggregate network, Babol ranked 5th out of 9 cities in Mazandaran and 165th out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
6.35
Rank in Iran
163rd of 169
Rank in Mazandaran
3rd of 9

Entire Network (Aggregate)

SNDi value
5.32
Rank in Iran
165th of 169
Rank in Mazandaran
5th of 9

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
BabolBomaBor

In new street additions, Babol and Boma both built increasingly disconnected streets over time, while Bor built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Babol and Boma both became progressively more disconnected, while Bor became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards.