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.

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.