Bagheria in context: Street-network sprawl trends

Bagheria in context

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
BagheriaSicily (Region)Italy (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Bagheria plotted against Sicily and Italy. The SNDi of new construction in Bagheria rose steadily, compared to Sicily which rose steadily and Italy which peaked in 1991-2005. Most recently, Bagheria's incremental SNDi rose from 3.9 to 6.13 between 1991-2005 and 2006-2020. In terms of the aggregate network, Bagheria ranked 2nd out of 8 cities in Sicily and 26th out of 88 in Italy as of 2020.

New Street Additions (2006–2020)

SNDi value
6.13
Rank in Italy
86th of 88
Rank in Sicily
8th of 8

Entire Network (Aggregate)

SNDi value
2.36
Rank in Italy
26th of 88
Rank in Sicily
2nd of 8

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

What about similarly populated cities?

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
BagheriaSidi Yahya du GharbCremona

In new street additions, Bagheria and Cremona both built increasingly disconnected streets over time, while Sidi Yahya du Gharb fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend.