Trapani in context: Street-network sprawl trends

Trapani in context

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
TrapaniSicily (Region)Italy (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Trapani plotted against Sicily and Italy. The SNDi of new construction in Trapani followed a zig-zag trend with an overall increase, compared to Sicily which rose steadily and Italy which peaked in 1991-2005. Most recently, Trapani's incremental SNDi rose from 3.04 to 4.26 between 1991-2005 and 2006-2020. In terms of the aggregate network, Trapani ranked 1st out of 8 cities in Sicily and 8th out of 88 in Italy as of 2020.

New Street Additions (2006–2020)

SNDi value
4.26
Rank in Italy
59th of 88
Rank in Sicily
3rd of 8

Entire Network (Aggregate)

SNDi value
1.91
Rank in Italy
8th of 88
Rank in Sicily
1st of 8

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

What about similarly populated cities?

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
TrapaniNippaniBajo Pichanaqui

Trapani, Nippani, and Bajo Pichanaqui all fluctuated in its street-construction patterns in new street construction. Looking at the full network, Nippani and Bajo Pichanaqui both fluctuated in connectivity, while Trapani became progressively more disconnected. Trapani and Nippani have been growing further apart in their street-network character since 1975.