Shahrud in context: Street-network sprawl trends

Shahrud in context

2.42.83.23.6<19751976–19901991–20052006–2020SNDi of street additions
2.42.83.23.6<19751976–19901991–20052006–2020SNDi of entire street network
ShahrudSemnan (Region)Iran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Shahrud plotted against Semnan and Iran. The SNDi of new construction in Shahrud was at its lowest in 1991-2005, compared to Semnan which was at its lowest in 1976-1990 and Iran which rose steadily. Most recently, Shahrud's incremental SNDi rose from 2.5 to 2.63 between 1991-2005 and 2006-2020. In terms of the aggregate network, Shahrud ranked 2nd out of 3 cities in Semnan and 52nd out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
2.63
Rank in Iran
35th of 169
Rank in Semnan
2nd of 3

Entire Network (Aggregate)

SNDi value
2.66
Rank in Iran
52nd of 169
Rank in Semnan
2nd of 3

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

What about similarly populated cities?

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
ShahrudHaveriIdi-Iroko

In new street additions, Shahrud built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns, while Haveri built increasingly disconnected streets from 1975 through 1976-1990, then improved and Idi-Iroko fluctuated in its street-construction patterns. For the full network, Shahrud became progressively more connected, while Haveri became progressively more disconnected and Idi-Iroko fluctuated in connectivity. Notably, Shahrud had a more sprawly network than Haveri in 1975 but the two have since reversed their relative ranking.