Ferrara in context: Street-network sprawl trends

Ferrara in context

2.433.64.2<19751976–19901991–20052006–2020SNDi of street additions
2.433.64.2<19751976–19901991–20052006–2020SNDi of entire street network
FerraraEmilia-Romagna (Region)Italy (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ferrara plotted against Emilia-Romagna and Italy. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Ferrara's incremental SNDi fell from 3.89 to 3.81 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ferrara ranked 9th out of 10 cities in Emilia-Romagna and 47th out of 88 in Italy as of 2020.

New Street Additions (2006–2020)

SNDi value
3.81
Rank in Italy
53rd of 88
Rank in Emilia-Romagna
10th of 10

Entire Network (Aggregate)

SNDi value
2.73
Rank in Italy
47th of 88
Rank in Emilia-Romagna
9th of 10

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

What about similarly populated cities?

4812<19751976–19901991–20052006–2020SNDi of street additions
4812<19751976–19901991–20052006–2020SNDi of entire street network
FerraraDabuOcotlan

While Dabu and Ocotlán both built increasingly disconnected streets over time, Ferrara built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. For the full street network, though, all three cities follow the same trend. Ferrara and Ocotlán have been converging in their street-network character since 1975.