La Spezia in context: Street-network sprawl trends

La Spezia in context

3456<19751976–19901991–20052006–2020SNDi of street additions
3456<19751976–19901991–20052006–2020SNDi of entire street network
La SpeziaLiguria (Region)Italy (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with La Spezia plotted against Liguria and Italy. While Liguria and Italy both peaked in 1991-2005, La Spezia's new street additions peaked in 1991-2005. Most recently, La Spezia's incremental SNDi fell from 4.94 to 4.44 between 1991-2005 and 2006-2020. In terms of the aggregate network, La Spezia ranked 2nd out of 3 cities in Liguria and 69th out of 88 in Italy as of 2020.

New Street Additions (2006–2020)

SNDi value
4.44
Rank in Italy
64th of 88
Rank in Liguria
1st of 3

Entire Network (Aggregate)

SNDi value
3.32
Rank in Italy
69th of 88
Rank in Liguria
2nd of 3

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
La SpeziaAnieZongyang

While Anié and Zongyang both fluctuated in its street-construction patterns, La Spezia built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. For the full network, La Spezia and Zongyang both became progressively more disconnected, while Anié fluctuated in connectivity.