Ahar in context: Street-network sprawl trends

Ahar in context

2.83.54.24.9<19751976–19901991–20052006–2020SNDi of street additions
2.83.54.24.9<19751976–19901991–20052006–2020SNDi of entire street network
AharEast Azarbaijan (Region)Iran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ahar plotted against East Azarbaijan and Iran. The SNDi of new construction in Ahar was at its lowest in 1991-2005, compared to East Azarbaijan which rose steadily and Iran which rose steadily. Most recently, Ahar's incremental SNDi rose from 2.54 to 3.51 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ahar ranked 3rd out of 8 cities in East Azarbaijan and 83rd out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
3.51
Rank in Iran
100th of 169
Rank in East Azarbaijan
2nd of 8

Entire Network (Aggregate)

SNDi value
2.93
Rank in Iran
83rd of 169
Rank in East Azarbaijan
3rd of 8

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

What about similarly populated cities?

0.91.82.73.6<19751976–19901991–20052006–2020SNDi of street additions
0.91.82.73.6<19751976–19901991–20052006–2020SNDi of entire street network
AharPuchengBalcad

In new street additions, Ahar and Balcad both built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns, while Pucheng built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Ahar and Balcad both became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards, while Pucheng grew more disconnected from 1975 through 1991-2005, then improved. Notably, Ahar had a more sprawly network than Pucheng in 1975 but the two have since reversed their relative ranking.