The level of street-network sprawl in new development in Umbria peaked in 1991-2005. To get a sense of how street development has changed in Umbria, we can consider two of its most populous cities: Terni and Perugia. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Terni rose steadily. The level of street-network sprawl in new development in Perugia peaked in 1976-1990.

How do development practices in Umbria fare in comparison to others in Italy? Most recently in 2006-2020, street construction in Umbria was the 10th-most disconnected out of the 17 regions in Italy. Its position in the ranks since 1975 has risen; relative to other regions in Italy, street construction in Umbria has become more disconnected. Umbria ranked 14th in 1975, 6th in 1976-1990, 12th in 1991-2005 and 10th in 2006-2020.

As of 2020, the city with the most disconnected street network in Umbria is Perugia with an SNDi of 3.34, which is moderately connected. Conversely, the most connected city is Terni with an SNDi of 3.3, which is moderately connected. See trends for these cities: Terni, Perugia

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

To date, Umbria is the 13th-most disconnected out of the 17 regions in Italy. Its position in the ranks since 1975 has risen; relative to other regions in Italy, the street network in Umbria has become more disconnected. Umbria ranked 14th in 1975, 14th in 1976-1990, 13th in 1991-2005 and 13th in 2006-2020.