The level of street-network sprawl in new development in Zanjan rose steadily. To get a sense of how street development has changed in Zanjan, we can consider two of its most populous cities: Zanjan and Abhar. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Zanjan was at its lowest in 1976-1990. The level of street-network sprawl in new development in Abhar followed a zig-zag trend with an overall decrease.

How do development practices in Zanjan fare in comparison to others in Iran? Most recently in 2006-2020, street construction in Zanjan was the 6th-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 Zanjan has become more disconnected. Zanjan ranked 10th in 1975, 4th in 1976-1990, 7th in 1991-2005 and 6th in 2006-2020.

As of 2020, the city with the most disconnected street network in Zanjan is Abhar with an SNDi of 2.79, which is relatively well-connected. Conversely, the most connected city is Zanjan with an SNDi of 2.76, which is relatively well-connected. See trends for these cities: Zanjan, Abhar

The level of street-network sprawl in the aggregate network in Zanjan rose steadily. To get a sense of how the aggregate street network has changed in Zanjan, we can consider two of its most populous cities: Zanjan and Abhar. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Zanjan was at its lowest in 1976-1990. The level of street-network sprawl in the aggregate network in Abhar peaked in 1976-1990.

To date, Zanjan is the 6th-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 Zanjan has become more disconnected. Zanjan ranked 10th in 1975, 8th in 1976-1990, 7th in 1991-2005 and 6th in 2006-2020.