Bandar-e Anzali in context: Street-network sprawl trends

Bandar-e Anzali in context

3.54.24.95.6<19751976–19901991–20052006–2020SNDi of street additions
3.54.24.95.6<19751976–19901991–20052006–2020SNDi of entire street network
Bandar-e AnzaliGilan (Region)Iran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Bandar-e Anzali plotted against Gilan and Iran. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Bandar-e Anzali's incremental SNDi rose from 4.42 to 5.29 between 1991-2005 and 2006-2020. In terms of the aggregate network, Bandar-e Anzali ranked 2nd out of 4 cities in Gilan and 141st out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
5.29
Rank in Iran
157th of 169
Rank in Gilan
2nd of 4

Entire Network (Aggregate)

SNDi value
3.89
Rank in Iran
141st of 169
Rank in Gilan
2nd of 4

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

What about similarly populated cities?

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
Bandar-e AnzaliWangchengMal Bazaar

In new street additions, Bandar-e Anzali built increasingly disconnected streets over time, while Wangcheng fluctuated in its street-construction patterns and Mal Bazaar fluctuated in its street-construction patterns. For the full network, Bandar-e Anzali became progressively more disconnected, while Wangcheng fluctuated in connectivity and Mal Bazaar fluctuated in connectivity. Notably, Bandar-e Anzali had a more sprawly network than Mal Bazaar in 1975 but the two have since reversed their relative ranking.