The level of street-network sprawl in new development in Iowa rose steadily. To get a sense of how street development has changed in Iowa, we can consider three of its most populous cities: Des Moines, Davenport and Cedar Rapids. Out of the three cities, Cedar Rapids does not follow the same trend as the region. The level of street-network sprawl in new development in Cedar Rapids peaked in 1991-2005.

As of 2020, the city with the most disconnected street network in Iowa is Iowa City with an SNDi of 2.53, which is relatively well-connected. Conversely, the most connected city is Cedar Rapids with an SNDi of 1.71, which is very well-connected. See trends for these cities: Cedar Rapids, Iowa City

The level of street-network sprawl in the aggregate network in Iowa rose steadily. To get a sense of how the aggregate street network has changed in Iowa, we can consider three of its most populous cities: Des Moines, Davenport and Cedar Rapids. Disconnectivity in the most populous cities in Iowa follow the same region trend.