The level of street-network sprawl in new development in Iwate followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Iwate, we can consider one of its most populous cities: Morioka. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Morioka peaked in 1976-1990.

How do development practices in Iwate fare in comparison to others in Japan? Most recently in 2006-2020, street construction in Iwate was the 30th-most disconnected out of the 44 regions in Japan. Its position in the ranks since 1975 has risen; relative to other regions in Japan, street construction in Iwate has become more disconnected. Iwate ranked 41st in 1975, 37th in 1976-1990, 29th in 1991-2005 and 30th in 2006-2020.

As of 2020, the city with the most disconnected street network in Iwate is Morioka with an SNDi of 2.91, which is moderately connected. Conversely, the most connected city is Morioka with an SNDi of 2.91, which is moderately connected. See trends for these cities: Morioka, Morioka

The level of street-network sprawl in the aggregate network in Iwate rose steadily. To get a sense of how the aggregate street network has changed in Iwate, we can consider one of its most populous cities: Morioka. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Morioka peaked in 1991-2005.

To date, Iwate is the 40th-most disconnected out of the 44 regions in Japan. Its position in the ranks since 1975 has risen; relative to other regions in Japan, the street network in Iwate has become more disconnected. Iwate ranked 41st in 1975, 41st in 1976-1990, 40th in 1991-2005 and 40th in 2006-2020.