Comparisons
Semnan vs. the other two most closely populated regions in Iran: Bushehr and North Khorasan
Semnan in context: Street-network sprawl of new development
The level of street-network sprawl in new development in Semnan was at its lowest in 1976-1990. To get a sense of how street development has changed in Semnan, we can consider three of its most populous cities: Mahdishahr, Shahrud and Semnan. Out of the three cities, Mahdishahr and Shahrud do not follow the same trend as the region. The level of street-network sprawl in new development in Mahdishahr fell steadily. The level of street-network sprawl in new development in Shahrud was at its lowest in 1991-2005.
How do development practices in Semnan fare in comparison to others in Iran? Most recently in 2006-2020, street construction in Semnan was the 8th-most disconnected out of the 31 regions in Iran. Its position in the ranks since 1975 has risen; relative to other regions in Iran, street construction in Semnan has become more disconnected. Semnan ranked 15th in 1975, 3rd in 1976-1990, 8th in 1991-2005 and 8th in 2006-2020.
Semnan in context: Aggregate street-network sprawl
As of 2020, the city with the most disconnected street network in Semnan is Semnan with an SNDi of 3.18, which is moderately connected. Conversely, the most connected city is Mahdishahr with an SNDi of 2.64, which is relatively well-connected. See trends for these cities: Mahdishahr, Semnan
The level of street-network sprawl in the aggregate network in Semnan was at its lowest in 1991-2005. To get a sense of how the aggregate street network has changed in Semnan, we can consider three of its most populous cities: Mahdishahr, Shahrud and Semnan. Out of the three cities, Mahdishahr and Shahrud do not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Mahdishahr fell steadily. The level of street-network sprawl in the aggregate network in Shahrud fell steadily.
To date, Semnan is the 13th-most disconnected out of the 31 regions in Iran. Its position in the ranks since 1975 has risen; relative to other regions in Iran, the street network in Semnan has become more disconnected. Semnan ranked 15th in 1975, 14th in 1976-1990, 12th in 1991-2005 and 13th in 2006-2020.