Torbat-e Heydarieh in context: Street-network sprawl trends

Torbat-e Heydarieh in context

33.54<19751976–19901991–20052006–2020SNDi of street additions
33.54<19751976–19901991–20052006–2020SNDi of entire street network
Torbat-e HeydariehRazavi Khorasan (Region)Iran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Torbat-e Heydarieh plotted against Razavi Khorasan and Iran. The SNDi of new construction in Torbat-e Heydarieh followed a zig-zag trend with an overall increase, compared to Razavi Khorasan which followed a zig-zag trend with an overall increase and Iran which rose steadily. Most recently, Torbat-e Heydarieh's incremental SNDi rose from 3.03 to 4.21 between 1991-2005 and 2006-2020. In terms of the aggregate network, Torbat-e Heydarieh ranked 6th out of 9 cities in Razavi Khorasan and 101st out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
4.21
Rank in Iran
137th of 169
Rank in Razavi Khorasan
9th of 9

Entire Network (Aggregate)

SNDi value
3.16
Rank in Iran
101st of 169
Rank in Razavi Khorasan
6th of 9

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
Torbat-e HeydariehHariharaBurnley

While Harihara and Burnley both built increasingly disconnected streets over time, Torbat-e Heydarieh fluctuated in its street-construction patterns in new street additions. For the full network, Torbat-e Heydarieh and Burnley both became progressively more disconnected, while Harihara grew more disconnected from 1975 through 1991-2005, then improved. Torbat-e Heydarieh and Harihara have been converging in their street-network character since 1975.