Grosseto in context: Street-network sprawl trends

Grosseto in context

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
GrossetoToscana (Region)Italy (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Grosseto plotted against Toscana and Italy. While Toscana and Italy both peaked in 1991-2005, Grosseto's new street additions peaked in 1991-2005. Most recently, Grosseto's incremental SNDi fell from 2.99 to 2.76 between 1991-2005 and 2006-2020. In terms of the aggregate network, Grosseto ranked 2nd out of 7 cities in Toscana and 20th out of 88 in Italy as of 2020.

New Street Additions (2006–2020)

SNDi value
2.76
Rank in Italy
16th of 88
Rank in Toscana
3rd of 7

Entire Network (Aggregate)

SNDi value
2.15
Rank in Italy
20th of 88
Rank in Toscana
2nd of 7

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
GrossetoGiddalurAboisso

In new street additions, Grosseto built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Giddalur fluctuated in its street-construction patterns and Aboisso built increasingly disconnected streets over time. For the full street network, though, all three cities follow the same trend. Grosseto and Giddalur have been growing further apart in their street-network character since 1975.