Catania in context: Street-network sprawl trends

Catania in context

2.83.54.24.9<19751976–19901991–20052006–2020SNDi of street additions
2.83.54.24.9<19751976–19901991–20052006–2020SNDi of entire street network
CataniaSicily (Region)Italy (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Catania plotted against Sicily and Italy. The SNDi of new construction in Catania rose steadily, compared to Sicily which rose steadily and Italy which peaked in 1991-2005. Most recently, Catania's incremental SNDi rose from 4.36 to 4.41 between 1991-2005 and 2006-2020. In terms of the aggregate network, Catania ranked 7th out of 8 cities in Sicily and 56th out of 88 in Italy as of 2020.

New Street Additions (2006–2020)

SNDi value
4.41
Rank in Italy
63rd of 88
Rank in Sicily
4th of 8

Entire Network (Aggregate)

SNDi value
3.12
Rank in Italy
56th of 88
Rank in Sicily
7th of 8

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

What about similarly populated cities?

2.73.64.55.4<19751976–19901991–20052006–2020SNDi of street additions
2.73.64.55.4<19751976–19901991–20052006–2020SNDi of entire street network
CataniaNakuruBazarati

In new street additions, Catania and Nakuru both built increasingly disconnected streets over time, while Bazarati fluctuated in its street-construction patterns. For the full network, Catania and Nakuru both became progressively more disconnected, while Bazarati became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Catania and Nakuru have been growing further apart in their street-network character since 1975.