Hamedan in context: Street-network sprawl trends

Hamedan in context

3.23.64<19751976–19901991–20052006–2020SNDi of street additions
3.23.64<19751976–19901991–20052006–2020SNDi of entire street network
HamedanHamadan (Region)Iran (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Hamedan plotted against Hamadan and Iran. The SNDi of new construction in Hamedan was at its lowest in 1976-1990, compared to Hamadan which was at its lowest in 1976-1990 and Iran which rose steadily. Most recently, Hamedan's incremental SNDi rose from 3.44 to 4.24 between 1991-2005 and 2006-2020. In terms of the aggregate network, Hamedan ranked 5th out of 5 cities in Hamadan and 117th out of 169 in Iran as of 2020.

New Street Additions (2006–2020)

SNDi value
4.24
Rank in Iran
140th of 169
Rank in Hamadan
5th of 5

Entire Network (Aggregate)

SNDi value
3.44
Rank in Iran
117th of 169
Rank in Hamadan
5th of 5

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

What about similarly populated cities?

2.433.64.2<19751976–19901991–20052006–2020SNDi of street additions
2.433.64.2<19751976–19901991–20052006–2020SNDi of entire street network
HamedanHataySiuri

In new street additions, Hamedan built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Hatay built increasingly disconnected streets from 1975 through 1976-1990, then improved and Siuri built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Hatay and Siuri both grew more disconnected from 1975 through 1991-2005, then improved, while Hamedan became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Hamedan and Hatay have been converging in their street-network character since 1975.