Esfarayen in context: Street-network sprawl trends

Esfarayen 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
EsfarayenNorth Khorasan (Region)Iran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Esfarayen plotted against North Khorasan and Iran. The SNDi of new construction in Esfarayen fell steadily, compared to North Khorasan which fell steadily and Iran which rose steadily. Most recently, Esfarayen's incremental SNDi fell from 2.71 to 2.65 between 1991-2005 and 2006-2020. In terms of the aggregate network, Esfarayen ranked 2nd out of 3 cities in North Khorasan and 62nd out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
2.65
Rank in Iran
36th of 169
Rank in North Khorasan
3rd of 3

Entire Network (Aggregate)

SNDi value
2.77
Rank in Iran
62nd of 169
Rank in North Khorasan
2nd of 3

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
EsfarayenZacatecolucaTres Coracoes

In new street additions, Esfarayen built increasingly connected streets over time, while Zacatecoluca built increasingly disconnected streets over time and Três Corações built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Zacatecoluca and Três Corações both became progressively more disconnected, while Esfarayen became progressively more connected. Notably, Esfarayen had a more sprawly network than Zacatecoluca in 1975 but the two have since reversed their relative ranking.