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

How do development practices in Ehime fare in comparison to others in Japan? Most recently in 2006-2020, street construction in Ehime was the 33rd-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 Ehime has become more disconnected. Ehime ranked 37th in 1975, 35th in 1976-1990, 30th in 1991-2005 and 33rd in 2006-2020.

As of 2020, the city with the most disconnected street network in Ehime is Matsuyama with an SNDi of 2.98, which is moderately connected. Conversely, the most connected city is Shikokuchuo with an SNDi of 2.54, which is relatively well-connected. See trends for these cities: Shikokuchuo, Matsuyama

The level of street-network sprawl in the aggregate network in Ehime rose steadily. To get a sense of how the aggregate street network has changed in Ehime, we can consider three of its most populous cities: Matsuyama, Niihama and Imabari. Out of the three cities, Matsuyama does not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Matsuyama peaked in 1991-2005.

To date, Ehime is the 33rd-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 Ehime has become more disconnected. Ehime ranked 37th in 1975, 35th in 1976-1990, 33rd in 1991-2005 and 33rd in 2006-2020.