Sareyn in context: Street-network sprawl trends

Sareyn in context

33.544.5<19751976–19901991–20052006–2020SNDi of street additions
33.544.5<19751976–19901991–20052006–2020SNDi of entire street network
SareynArdebil (Region)Iran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Sareyn plotted against Ardebil and Iran. The SNDi of new construction in Sareyn was at its lowest in 1976-1990, compared to Ardebil which followed a zig-zag trend with an overall decrease and Iran which rose steadily. Most recently, Sareyn's incremental SNDi rose from 3.33 to 3.36 between 1991-2005 and 2006-2020. In terms of the aggregate network, Sareyn ranked 4th out of 4 cities in Ardebil and 121st out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
3.36
Rank in Iran
86th of 169
Rank in Ardebil
2nd of 4

Entire Network (Aggregate)

SNDi value
3.48
Rank in Iran
121st of 169
Rank in Ardebil
4th of 4

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

What about similarly populated cities?

34567<19751976–19901991–20052006–2020SNDi of street additions
34567<19751976–19901991–20052006–2020SNDi of entire street network
SareynCardiffPhuket

In new street additions, Sareyn built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Cardiff built increasingly disconnected streets from 1975 through 1991-2005, then improved and Phuket built increasingly disconnected streets over time. Looking at the full network, Cardiff and Phuket both became progressively more disconnected, while Sareyn became progressively more connected. Notably, Sareyn had a more sprawly network than Cardiff in 1975 but the two have since reversed their relative ranking.