Sabzevar in context: Street-network sprawl trends

Sabzevar 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
SabzevarRazavi Khorasan (Region)Iran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Sabzevar plotted against Razavi Khorasan and Iran. The SNDi of new construction in Sabzevar followed a zig-zag trend with an overall decrease, compared to Razavi Khorasan which followed a zig-zag trend with an overall increase and Iran which rose steadily. Most recently, Sabzevar's incremental SNDi fell from 2.75 to 2.71 between 1991-2005 and 2006-2020. In terms of the aggregate network, Sabzevar ranked 3rd out of 9 cities in Razavi Khorasan and 76th out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
2.71
Rank in Iran
43rd of 169
Rank in Razavi Khorasan
4th of 9

Entire Network (Aggregate)

SNDi value
2.86
Rank in Iran
76th of 169
Rank in Razavi Khorasan
3rd of 9

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

What about similarly populated cities?

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
SabzevarAnnecyRajim

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