The level of street-network sprawl in new development in Aichi followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Aichi, we can consider three of its most populous cities: Nagoya, Toyohashi and Gamagori. Out of the three cities, Nagoya and Toyohashi do not follow the same trend as the region. The level of street-network sprawl in new development in Nagoya rose steadily. The level of street-network sprawl in new development in Toyohashi peaked in 1976-1990.

How do development practices in Aichi fare in comparison to others in Japan? Most recently in 2006-2020, street construction in Aichi was the 2nd-most disconnected out of the 44 regions in Japan. Its position in the ranks since 1975 has fallen; relative to other regions in Japan, street construction in Aichi has become more connected. Aichi ranked 1st in 1975, 1st in 1976-1990, 1st in 1991-2005 and 2nd in 2006-2020.

As of 2020, the city with the most disconnected street network in Aichi is Nagoya with an SNDi of 1.63, which is very well-connected. Conversely, the most connected city is Gamagori with an SNDi of 1.54, which is very well-connected. See trends for these cities: Gamagori, Nagoya

The level of street-network sprawl in the aggregate network in Aichi rose steadily. To get a sense of how the aggregate street network has changed in Aichi, we can consider three of its most populous cities: Nagoya, Toyohashi and Gamagori. Disconnectivity in the most populous cities in Aichi follow the same region trend.

To date, Aichi is the 1st-most disconnected out of the 44 regions in Japan. Its position in the ranks since 1975 has not changed. Aichi ranked 1st in 1975, 1st in 1976-1990, 1st in 1991-2005 and 1st in 2006-2020.