Naples in context: Street-network sprawl trends

Naples in context

33.64.24.8<19751976–19901991–20052006–2020SNDi of street additions
33.64.24.8<19751976–19901991–20052006–2020SNDi of entire street network
NaplesCampania (Region)Italy (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Naples plotted against Campania and Italy. The SNDi of new construction in Naples peaked in 1976-1990, compared to Campania which peaked in 1991-2005 and Italy which peaked in 1991-2005. Most recently, Naples's incremental SNDi fell from 4.71 to 4.56 between 1991-2005 and 2006-2020. In terms of the aggregate network, Naples ranked 7th out of 7 cities in Campania and 79th out of 88 in Italy as of 2020.

New Street Additions (2006–2020)

SNDi value
4.56
Rank in Italy
67th of 88
Rank in Campania
4th of 7

Entire Network (Aggregate)

SNDi value
3.49
Rank in Italy
79th of 88
Rank in Campania
7th of 7

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

What about similarly populated cities?

468<19751976–19901991–20052006–2020SNDi of street additions
468<19751976–19901991–20052006–2020SNDi of entire street network
NaplesDamascusDurban

While Damascus and Durban both built increasingly disconnected streets over time, Naples built increasingly disconnected streets from 1975 through 1976-1990, then improved in new street additions. For the full street network, though, all three cities follow the same trend. Naples and Damascus have been converging in their street-network character since 1975.