Shiraz in context: Street-network sprawl trends

Shiraz in context

3.63.94.24.5<19751976–19901991–20052006–2020SNDi of street additions
3.63.94.24.5<19751976–19901991–20052006–2020SNDi of entire street network
ShirazFars (Region)Iran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Shiraz plotted against Fars and Iran. While Fars and Iran both rose steadily, Shiraz's new street additions rose steadily. Most recently, Shiraz's incremental SNDi rose from 4.35 to 4.55 between 1991-2005 and 2006-2020. In terms of the aggregate network, Shiraz ranked 10th out of 11 cities in Fars and 151st out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
4.55
Rank in Iran
143rd of 169
Rank in Fars
10th of 11

Entire Network (Aggregate)

SNDi value
4.2
Rank in Iran
151st of 169
Rank in Fars
10th of 11

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

What about similarly populated cities?

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
ShirazJerusalemAdelaide

In new street additions, Shiraz and Jerusalem both built increasingly disconnected streets over time, while Adelaide built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full street network, though, all three cities follow the same trend.