Semnan in context: Street-network sprawl trends
Semnan in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Semnan plotted against Iran. The SNDi of new construction in Semnan was at its lowest in 1976-1990, while Iran rose steadily. Most recently, Semnan's incremental SNDi rose from 2.97 to 3.57 between 1991-2005 and 2006-2020. In terms of the aggregate network, Semnan ranked 102nd out of 169 in Iran as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 3.57
- Rank in Iran
- 103rd of 169
Entire Network (Aggregate)
- SNDi value
- 3.18
- Rank in Iran
- 102nd of 169
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
- Sherghati, India
- Kwaksan, North Korea
- Hengdian, China
- Daishan County, China
- Reus, Spain
- Mafuo, Democratic Republic of the Congo
In new street additions, Semnan built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Sherghati built increasingly disconnected streets from 1975 through 1991-2005, then improved and Daishan County fluctuated in street-construction patterns. For the full network, Semnan became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards, while Sherghati grew more disconnected from 1975 through 1991-2005, then improved and Daishan County fluctuated in connectivity. Semnan and Daishan County have been converging in their street-network character since 1975.