Yazd in context: Street-network sprawl trends

Yazd in context

3.43.53.63.7<19751976–19901991–20052006–2020SNDi of street additions
3.43.53.63.7<19751976–19901991–20052006–2020SNDi of entire street network
YazdIran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Yazd plotted against Iran. The SNDi of new construction in Yazd was at its lowest in 1991-2005, while Iran rose steadily. Most recently, Yazd's incremental SNDi rose from 3.39 to 3.56 between 1991-2005 and 2006-2020. In terms of the aggregate network, Yazd ranked 122nd out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
3.56
Rank in Iran
102nd of 169

Entire Network (Aggregate)

SNDi value
3.48
Rank in Iran
122nd of 169

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

What about similarly populated cities?

3.64.24.85.4<19751976–19901991–20052006–2020SNDi of street additions
3.64.24.85.4<19751976–19901991–20052006–2020SNDi of entire street network
YazdJingdezhenCanning

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